Sunday, August 10, 2025

 

How Climate Change is Brewing a Coffee Crisis



Kate Petty 



Severe weather, shifting trade policies, and a lack of support for small farmers are driving coffee prices sky high. Without urgent investment, your daily brew could become a luxury.


In January 2025, the price of coffee reached an “all-time high” for consumers in the United States; it is now poised to rise throughout the world. In May 2025, an article in Deutsche Welle stated that “the era of cheap coffee may be over.” This anticipated outcome is due to a combination of factors, including extreme weather, shrinking harvests, shifting trade policies, and rising production costs, which are straining the global supply chain. Meanwhile, the demand for coffee continues to rise.

Climate disruptions, such as prolonged droughts followed by excessive rain, are being seen in Vietnam and Brazil, the two largest coffee-producing countries. They are responsible for nearly 50 percent of the world’s coffee supply, and their losses have led to a decline in yields and an increase in prices. In November 2024, Coffee Intelligence reported that coffee prices had surged to a 47-year high.

At the same time, farmers have had to pay more for fertilizers, transportation, and labor. All these factors have contributed to the rising retail prices. “Many producers are grappling with increased production costs due to inflation and climate-related disruptions,” explained a March 2025 article in Coffee Intelligence.

The situation is likely to worsen owing to climate change. “Coffee plants will grow less productive as the earth’s temperature continues to rise, and practices like deforestation will continue to threaten the sustainability of the industry,” stated a January 2025 article in the New York Times.

Fluctuating Coffee Prices

Coffee is one of the world’s most widely traded commodities, second only to oil. Grown primarily in tropical regions, it is consumed across every continent. Historically, coffee prices have fluctuated, spiking during crop failures caused by extreme weather conditions or political instability in major coffee-producing countries, such as Brazil and Vietnam, and plummeting during periods of oversupply.

“The rising coffee prices are part of a larger, global challenge driven by climate change, economic pressures, and geopolitical uncertainty,” said Yannis Apostolopoulos, the CEO of the Specialty Coffee Association (SCA), in a January 2025 article in Food & Wine. Apostolopoulos added that while consumers in the United States may see fluctuations in pricing at retail establishments and cafes, the effects were being felt most “acutely by coffee producers around the world, many of whom are already vulnerable to market volatility and the effects of climate disruptions.”

According to a 2023 article in the Guardian, coffee-producing regions have been hit by a series of extreme weather events over the past four decades. According to a study by PLOS Climate, these will lead to “ongoing systemic shocks” in global coffee production. Layered atop these are shifting trade policies, soaring shipping costs, and persistent supply-chain bottlenecks. These further strain the coffee market and threaten the livelihoods of 125 million people who depend on it.

In 2024, the rise in prices led to a 3.8 percent decline in coffee consumption in North America and Europe. In January 2025, retail prices for ground coffee in the United States reached record highs, with some cases rising by 75 percent from their levels in January 2020. “Consumers are adapting by drinking more coffee at home, with only 30 percent of consumption happening outside the home, down from 60 percent pre-COVID-19,” stated an April 2025 article in Future.

According to a March 2025 report by the Food and Agriculture Organization of the United Nations (FAO), “in December 2024, Arabica, the higher quality coffee favored in the roast and ground coffee market, was selling at 58 percent up on a year ago, while Robusta, used mainly for instant coffee and blending, saw a price surge of 70 percent.” These compounding pressures are shrinking profit margins for producers and ultimately contributing to higher prices for consumers at cafes, supermarkets, and beyond.

Grounds for Concern

According to the 2024-2025 data provided by the Foreign Agriculture Service of the United States Department of Agriculture (USDA), Brazil remains the largest producer of coffee globally, contributing approximately 37 percent of the world’s production, with a primary focus on Arabica beans. Vietnam ranks second, supplying around 17 percent of the global output; it produces mainly Robusta coffee beans. Brazil has endured historic droughts in recent cycles, drastically reducing both flowering and harvests. “The problem for over five years now is how the coffee regions are hot and dry,” says Marco Antonio Jacob, a Brazilian economist, according to a 2024 article in the Global Coffee Report.

Highlighting the extreme climatic conditions being faced by Brazil, its National Center for Monitoring and Early Warning of Natural Disasters said in September 2024 that it was facing the “most intense and widespread drought in history.” Simultaneously, Vietnam has experienced periods of prolonged dryness followed by intense rainfall, which has damaged crops and triggered production deficits.

Speaking to the Canadian Press in 2024, Adam Pesce, president of Reunion Coffee Roasters headquartered in Oakville, Ontario, remarked, “We’re seeing climate change really impacting coffee prices in a major way. It is a perfect storm sort of scenario when you have the two biggest coffee-growing countries in the world having the same sort of challenges in the same year. It’s never really happened before, and that’s why you see not just a pop in prices, but the pop being sustained.”

Scientists warn that these volatile conditions, driven by shifting climate patterns, will continue to reduce both the yield and quality of coffee crops. A study published in 2022 in MDPI, a publisher of peer-reviewed open-access journals, stated that “the Intergovernmental Panel on Climate Change (IPCC) reports indicate that climate change (CC) will reduce worldwide yields on average and decrease coffee-suitable land by 2050.” With global demand remaining strong, these climate disruptions are expected to keep prices elevated for the foreseeable future.

A Casualty of Climate Change

As extreme weather events increasingly disrupt once-predictable growing seasons, Brazil and Vietnam are among the countries most severely affected, according to the Food and Agriculture Organization. Industry experts warn that a significant portion of current coffee-growing land could become unsuitable in the coming decades if the climate crisis isn’t addressed. “Estimates show that 30 years from now, basically 50 percent of coffee lands as we know them today will not be viable for coffee production anymore,” said Philipp Navratil, chief executive officer at NestlĂ© Nespresso, as quoted in a 2023 Bloomberg article. A 2022 study published in PLOS One confirmed this, stating that coffee-growing regions would be most vulnerable due to climate change, with “negative climate impacts dominating in all main producing regions.”

The main issue is likely to be the availability of land to ensure the production of high-quality coffee. “Because higher-altitude coffees tend to be higher-quality coffees, rising temperatures will force farmers up the mountainside to seek out the cooler temperatures that specialty coffee needs. But as farmers move up the mountainsides, there is less and less land available for coffee,” explained Alex Morgan, former chief markets officer at Rainforest Alliance, while speaking with the Perfect Daily Grind in 2018.

The drought in Brazil in 2024—driven largely by El Niño, a natural Pacific warming cycle intensified by climate change—has taken a lasting toll on the country’s coffee sector. The drought was followed by sharp cold snaps and torrential rains, further damaging key coffee-producing regions and leading to a significant decline in annual exports, according to a 2024 report published by Progressive Farmer. Forecasts for 2025 continue to suggest less productive rainy seasons ahead, raising concerns about an incomplete recovery and the heightened risk of widespread wildfires, particularly in vulnerable areas of the Brazilian Amazon.

Coffee has become a cornerstone of Vietnam’s agricultural economy. However, its expansion has unfolded alongside growing climate pressures that now pose serious risks to the industry’s long-term viability. According to the Columbia Climate School, “Coffee is a big business in Vietnam, accounting for 3 percent of its gross domestic product and about 15 percent of its agricultural exports. But climate variability and change are threatening the country’s coffee crops. Rising temperatures and extreme weather have subjected Vietnamese coffee farmers to increasing uncertainties: longer droughts, more frequent floods, and severe outbreaks of pests and diseases that result in reduced productivity.”

According to the Climate Impacts Tracker Asia, climate-related natural disasters—including storms, floods, and droughts—have repeatedly disrupted agricultural output in the central and central highlands regions, the country’s primary coffee-growing areas, leading to reduced exports. Looking ahead, further supply constraints remain a concern, as growers continue to grapple with worsening climate conditions, most notably water scarcity and increasingly strained irrigation systems.

Global Gridlock and Trade Turbulence

Compounding these climate-driven setbacks are economic pressures, especially shifting trade policies, which have become significant disruptors of global supply chains, adding layers of complexity and cost when the industry is already grappling with climate-related challenges. Many coffee-exporting countries are vulnerable to increased tariffs when they export their beans to major consuming markets, such as the United States, Europe, and Asia.

Beyond direct costs, tariffs can lead to delays at ports owing to increased customs scrutiny, thus further slowing the flow of goods. Additionally, changing trade agreements and protectionist policies create uncertainty for producers and exporters, complicating long-term planning and investment.

A major concern is the impact on small and mid-sized coffee roasters that lack the financial cushion of larger corporations. Higher import costs on roasted and processed coffee reduce profit margins and limit consumer choice. Grocery retailers may also experience price hikes for packaged ground coffee if production expenses rise due to added import taxes.

In 2025, coffee industry leaders raised concerns about potential disruptions from evolving trade policies. “The added uncertainty surrounding cross-border commerce makes it difficult for our members to plan ahead,” said Bill Murray, president and CEO of the National Coffee Association, which represents the $343-billion U.S. coffee industry. “We urge policymakers to consider how essential commodities like coffee are impacted.”

“The consequences of high tariffs are cataclysmic for the industry,” said Christopher Feran, an independent coffee consultant and founder of Aviary Coffee, as quoted in Fresh Cup, which tells stories and promotes education about the coffee and tea industries.

“Tariffs… don’t just disrupt business. They dismantle trust and undo climate adaptation efforts,” noted a blog by Ebru Coffee Co., a single-origin, sustainable coffee producer, roaster, and retailer based in Audubon, Pennsylvania. “They push farmers, many of whom are already on the brink, back into exploitative systems that pay less, demand more, and care little for the land.”

From Seed to Cup

According to the Food and Agriculture Organization of the United Nations, the coffee industry sustains the livelihoods of some 25 million farmers. It creates additional employment throughout the coffee value chain—the full range of activities and stakeholders involved in the production, processing, distribution, and sale of coffee, from seed to cup.

For many low-income countries, coffee exports represent a significant source of revenue, generating foreign currency reserves that are essential for securing access to global markets for the import of goods and services. For instance, Vietnam’s export turnover has increased over the past five years, rising from $2.66 billion in 2020 to $5.48 billion in 2024, according to figures published by Vietnam Briefing.

The coffee supply chain is a complex global network that reaches from small farms to multinational retailers. It begins with cultivation, primarily by smallholder farmers in tropical regions such as Brazil, Vietnam, Colombia, and Ethiopia. “Coffee is grown on 12.5 million farms around the world, predominantly run by smallholder farmers cultivating 5 hectares [12.3 acres] or less,” according to a 2022 global market report. After harvesting, coffee cherries are processed—typically through either wet or dry methods—to extract the beans, which are then dried, sorted, and often exported as green coffee.

A significant obstacle to sustainable coffee production is the persistent financial gap that prevents many farmers, especially smallholders, from investing in climate-resilient practices and infrastructure. While the coffee industry increasingly recognizes the need for sustainable farming to combat climate change, land degradation, and biodiversity loss, funding to support this transition remains significantly below what is needed.

Brewing a Sustainable Future

Most of the world’s coffee is grown by smallholder farmers who often lack access to affordable credit, crop insurance, or long-term financing. According to the nonprofit Borgen Project, “44 percent of the world’s smallholder coffee farmers are currently living in poverty and 22 percent live in extreme poverty.” These producers face high upfront costs for adopting sustainable practices such as planting climate-resilient coffee beans, installing water-efficient irrigation systems, or transitioning to agroforestry. Without financial support or incentives, many farmers simply cannot afford to make these investments, even if doing so would improve yields and resilience over time.

Sustainable coffee farming requires more labor, investment, and risk. However, over the past decade, many farmers have made a shift, adopting regenerative techniques, protecting their ecosystems, and establishing direct relationships with ethical roasters. What was once a move toward independence and climate resilience, however, is increasingly threatened by fluctuating trade policies, which make direct, ethical trade more expensive and less viable.

“Current value distribution makes coffee production economically unviable for most farming families and the planet,” said Annette Pensel, director of the Global Coffee Platform that “[advances] coffee sustainability and farmer prosperity.“This challenges the ambition of the coffee industry to become sustainable.”

Global commitments from corporations and governments to source sustainable coffee are often not matched by tangible funding mechanisms. Bridging this financial gap will require coordinated efforts from both the public and private sectors—through blended financial models, fairer trade terms, carbon credit markets, and direct investment in farming communities—to ensure that sustainability is not just a market demand but an achievable reality for those who grow the crop.

Empowering Farmers, Cultivating Sustainability

Several organizations actively support small coffee farmers in Brazil and Vietnam, focusing on sustainability, empowerment, and market access. In Brazil, the Global Coffee Platform (GCP) operates a country platform that brings together brands, NGOs, cooperatives, and producers to promote sustainable coffee production through training programs and collective action on environmental management.

Local cooperatives, such as the Association of Agricultural Families from Santo AntĂ´nio do Ampere (AFASACAFÉ), empower around 150 farmers by providing processing facilities, quality testing labs, and export opportunities, often with support from foundations. One of them is the Hanns R. Neumann Stiftung (HRNS), a German-based nonprofit that works directly with more than 300,000 smallholder coffee families in 18 countries.

Development initiatives backed by institutions such as the Inter-American Development Bank and the World Bank further support smallholders by strengthening farmer groups, enhancing climate resilience, and facilitating fair-trade certifications that provide access to international markets.

In Vietnam, several organizations focus on empowering coffee farmers, particularly women, who make up 70 percent of the workforce. The International Women’s Coffee Alliance (IWCA) Vietnam chapter offers training in soft skills and income diversification to support women coffee producers in enhancing their productivity and economic security.

Digital tools developed by initiatives such as GREENCoffee Vietnam (under the WaterWatch Foundation) have reached tens of thousands of farmers in the Central Highlands, offering climate-smart advisories, weather updates, and sustainable farming tips. Additionally, the Global Coffee Platform collaborates with Vietnamese partners, such as the Vietnam Union of Friendship Organizations, to enhance farmer training and improve quality and incomes in key coffee-growing regions.

The International Fund for Agricultural Development (IFAD) also invests in upland agroforestry and market access projects targeting small-scale, ethnic minority, and women coffee growers. The Solidaridad Network, a Dutch NGO with roots in fair trade and sustainability, supports sustainable coffee supply chains in both Brazil and Vietnam. Together, these organizations offer a comprehensive blend of technical assistance, financial support, market integration, and empowerment programs that enable small coffee farmers to navigate the challenges of climate change, market volatility, and social inequalities.

The Alliance of Bioversity and CIAT have collaborated with coffee farmers to address how regenerative agriculture and diversification can generate more stable profits for farmers in the short term, while also contributing to the regeneration of natural processes and ecosystem services that secure coffee production for future generations.

To truly make sustainable coffee sourcing viable at the farm level, financial solutions must be paired with practical, resilient farming systems. Agroforestry has emerged as the leading strategy, gaining global momentum for sustainable coffee farming.

Agroforestry: The Future of Coffee Cultivation

Agroforestry provides a comprehensive approach to addressing the numerous challenges facing the coffee sector, particularly those related to climate change, environmental degradation, and economic vulnerability.

“Agroforestry is a system… [that] strategically integrates different types of trees within coffee farms, creating a microclimate within the plantation. These microclimates promote increased biodiversity and soil enrichment, and they reduce erosion and water pollution, leading to increased carbon storage and lower temperatures,” explained Earth.org. Agroforestry equips coffee farmers with natural tools to adapt and thrive in the face of evolving challenges, making it a promising and vital path for the future of coffee cultivation worldwide.

Shade trees help regulate microclimates on the farm by reducing temperature extremes and protecting coffee plants from direct sunlight and harsh weather. This buffering effect can mitigate the impacts of increasing heat and drought. Shade trees also improve soil health by enhancing organic matter and reducing erosion, which supports better water retention and nutrient cycling, critical factors for maintaining coffee yield and quality.

Additionally, agroforestry promotes biodiversity by providing habitat for beneficial insects, birds, and other wildlife, which can help control pests and reduce the need for chemical pesticides. This ecological balance supports healthier coffee plants and a safer environment for farmers and surrounding communities.

Economically, diversifying with trees and other crops can offer farmers additional income streams—such as fruit, timber, or medicinal plants—helping reduce financial risk and increase overall livelihood stability. This integrated approach not only safeguards coffee production but also contributes to carbon sequestration, helping mitigate global warming.

By reframing coffee as a climate issue, we can shift conversations from consumer taste and pricing to sustainability, resilience, and justice, highlighting the urgent need for agroecological practices, climate adaptation funding, and fairer trade policies that support farmers facing environmental upheaval. This narrative encourages consumers, policymakers, and industry leaders to see coffee not as a luxury but as a shared responsibility in the climate fight.

Kate Petty is an educator, writer, yoga teacher, and activistThis article was produced by Earth • Food • Life, a project of the Independent Media Institute.

Courtesy: Independent Media Institute

Decolonisation, Minerals and Imperialism


Prabhat Patnaik | NEWSCLICK


Anti-imperialist resistance will become stronger and the struggle for reacquisition of control over natural resources, including minerals, will become more powerful.



Image Courtesy: Wikimedia Commons

The Industrial Revolution which inaugurated industrial capitalism in the world had occurred in Britain in cotton textiles; but neither Britain nor other North European countries could grow any raw cotton at all. The very coming into being of industrial capitalism in short was dependent upon the metropolis obtaining a steady supply of raw materials from wherever they happened to be produced. This situation has not changed one iota in all these years.

The composition of output in metropolitan capitalism has changed over time with new products replacing old ones; along with this change, the composition of the required raw materials too has changed. But a substantial proportion of these raw materials continue to lie outside the domain of metropolitan capitalism and a steady supply of these materials has to be obtained by it on an assured basis; the need for ensuring such a steady supply provides a powerful motive for imperialist control over the “outside” world by metropolitan capitalism.

Traditional bourgeois economics visualises such supplies being made available to the metropolis through normal commodity exchange. These raw materials, in other words, are assumed to be already produced as commodities; and their supply in adequate quantities for meeting the demand for them is assumed to be ensured through price variations, obviating any necessity for exercising imperialist control.

This, however, assumes that all production of all raw materials is already being conducted under capitalist conditions, presumably through raw material companies from the metropolis. This argument thus denies the need for imperialism by assuming in effect that imperialism already pervades the world.

Or, to put it differently, it postulates that there is no distinction between the metropolis and the “outside”, since the “outside” is supposed to have been already annexed and assimilated by the metropolis. The irony here lies in the fact that bourgeois economics seeks to argue against the existence of imperialism by implicitly assuming that it is already pervasively prevalent.

There is a second argument that is often put forward by bourgeois economics against capitalism’s drive for imperialism. Many authors draw attention to the extremely small share that such raw materials from “outside” have in the total value of output of the metropolis. It is absurd, they argue, to suggest that metropolitan capitalism would make the extraordinary effort of engaging in a quest for imperialist world domination just for procuring raw materials that account for such a tiny proportion of its total output value.

The reply to this claim was provided by Harry Magdoff in his book The Age of Imperialism, where he made the crucial point that one cannot have any manufacturing whatsoever without the use of inputs as use-values; and this is sono matter how small the exchange value of these inputs may be relative to the total exchange value of the product.

Since exchange values are socially determined, the exchange value of raw materials can be pushed down even to zero owing to the power of metropolitan capital; but the physical use of inputs for production is naturally determined and simply cannot be avoided. And obtaining these physical inputs from “outside” is a paramount necessity for metropolitan capitalism.

To argue from the relatively small size of the exchange value embodied in the raw materials that their significance for production is negligible, or that acquisition of control over their sources of supply is of secondary importance, constitutes a grievous error.

While both agricultural raw materials and food crops are important requirements for metropolitan capitalism for which it wants to control the pattern of land-use all over the world, so that its demands and those of the population resident within its domain are met, we shall focus in what follows on the case of minerals only. In fact, the critical nature of the dependence of the metropolis on mineral imports from “outside” was demonstrated recently by the American experience with regard to rare earths.

Against Donald Trump’s threat to raise tariffs against imports from China, the Chinese government announced a temporary moratorium on the export of certain rare earth elements to the US. Since China is the largest producer of rare earths in the world, accounting for about 70% of total world output, and has an even larger share, around 90%, of the world’s rare earths processing capacity, the Chinese suspension of exports to the US put the latter in a real bind. Not only could it not get rare earths from China, but it could not also get sufficient rare earths from any other country to replace Chinese supplies, since no other country produces anywhere near China’s output. The US was forced, therefore, to negotiate with China on tariffs in return for the resumption of rare earths supplies from the latter.

The point to note, however, is this: the total value of US rare earths imports in 2024 was just $170 million. The total value of US imports of all goods and services in 2024 being $4.11 trillion, the imports of rare earths alone accounted for only around .004% of its total imports. The divergence between use value and exchange value could not be sharper than in this case: certain mineral elements constituting just .004% of imports are nonetheless of such critical importance in a whole range of industries from electronics to automotives to wind turbines to high performance magnets to medical equipment, that even a temporary disruption in their supplies becomes a matter of great concern.

The motivation this provides for imperialist expansion is also clear from this instance. In order to reduce reliance on Chinese supplies of rare earths, the US is exploring other possible supply sources such as Greenland. Of course, American interest in Greenland is for a whole range of other mineral products as well, not just for rare earth elements; but an edge to this imperialist quest for Greenland has been imparted by China’s temporary disruption of rare earths supplies. These alternative sources of supply can never supplant China fully, since China has about half of the world’s reserves of rare earth elements; but this instance captures in a nutshell a crucial motivation for capitalist imperialism.

This, to be sure, is not the only motivation. German philosopher Rosa Luxemburg had rightly underscored the market motive for imperialism, the fact that sustained capital accumulation within the metropolis is impossible without its making inroads into pre-capitalist markets lying outside of it, for which imperialist annexations of these outside territories becomes necessary. But while it is possible to visualise external stimuli for the capitalist sector other than pre-capitalist markets, such as for instance the demand arising from the capitalist state located within this mode of production itself (though the importance of this alternative stimulus declines in the era of globalisation), there can be no substitute sources of all the raw materials required by metropolitan capitalism within metropolitan capitalism itself. The quest for raw materials, including minerals, provides therefore an abiding motive for capitalist imperialism.

It is not surprising that the really intense struggle launched by the advanced capitalist countries against the countries of the Global South was when the latter, following their political decolonisation, sought to achieve economic decolonisation by acquiring control over their natural resources, including their mineral wealth. The coup d’etats engineered by imperialism against Mossadegh in Iran, Arbenz in Guatemala, Allende in Chile, and Lumumba in Congo were linked to these leaders’ plans to acquire control over their respective countries’ natural resources, including in most cases mineral wealth.

The imposition of neoliberal regimes on the Global South, under which control over the latter’s natural resources passed back in many instances to metropolitan capital, provided a more stable and reliable imperial arrangement. It obviated to an extent the necessity for such coups; structural constraints imposed on these countries now started playing the role that changes in government had played earlier.

But with the neoliberal order running into a crisis, and the attempt on the part of US imperialism to cope with this crisis by imposing a one-way “beggar-thy-neighbour” policy on other countries, especially those in the Global South, things are beginning to change.

The anti-imperialist resistance of these countries will become stronger in this new situation; and their struggle for the reacquisition of control over their natural resources, including minerals, will become more powerful in the coming days. The crisis of capitalism thus makes imperialism more vulnerable, and hence also even more vicious.

The writer is Professor Emeritus, Centre for Economic Studies and Planning, Jawaharlal Nehru University, New Delhi. The views are personal.

 

Uttarakhand: Dharali Disaster Exposes Laxity in Monitoring Himalayan Threats



Seema Sharma 

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Glacier thinning is destabilising mountain slopes, increasing the likelihood of deep-seated landslides, say experts, calling for urgent need for early warning systems.



Image Courtesy: Screenshort from twitter/ @soumyajitt

India’s Himalayan states have been bearing the brunt of rising extreme weather events with the beginning of the Southwest Monsoon 2025, with a suspected cloudburst in Uttarakhand being the most recent one.

On the afternoon of August 5, a giant stream of water came gushing down the streets of Dharali village in Uttarkashi district, crumbling infrastructure on its way. While early visuals of the incidents indicated a possible cloudburst that triggered the flash floods, investigations are underway to ascertain the exact reason behind the catastrophic event.

Changing snowfall and rainfall patterns due to climate change have made the Himalayan mountains vulnerable. Glacier retreat and permafrost thaw have decreased the stability of mountain slopes and the integrity of infrastructure, cited in a special report on the cryosphere by the Intergovernmental Panel on Climate Change (IPCC).

Climate Science and Role of Climate Change

According to scientists, there is no doubt that the rise in temperatures and humidity in the region has triggered back-to-back extreme weather events.

Mahesh Palawat, Vice President- Meteorology and Climate Change, Skymet Weather, said, “With the axis of the monsoon trough running through the foothills of the Himalayas, we had already predicted a red alert for Uttarakhand. While the affected region is prone to cloudbursts, such a turn of events is due to the climate change-led rise in temperatures.”

He added that “a huge influx of moisture from the abnormal warming of oceans increases the capacity of the air to hold more water vapour. The Himalayas act as barriers, which give rise to vertically developed convective clouds, known as Cumulonimbus clouds. Sometimes, the vertical height of such clouds might even reach up to 50,000 feet. These clouds are like a column of water, which, when restricted due to topography like the mountains, can lead to the release of water over a smaller area in a shorter duration. This may lead to similar conditions to what we have witnessed in Uttarakhand.

Climate change has been consistently altering monsoon weather patterns, disturbing the distribution of the rainfall. Western Himalayan states, which are located on the northern edge of the Indian Monsoon, are highly vulnerable to heavy rainfall. Uttarakhand and Himachal Pradesh have witnessed several devastating floods exacerbated by rising temperatures. Rise in torrential monsoon rainfall spells across the Himalayan region can also be attributed to some bigger changes in atmospheric systems in the nearby areas.

According to a recent study, West Asia is undergoing an increase in land heating during spring, which is responsible for 46% of the intensified rainfall over Northwest India and Pakistan during 1979–2022. The transition region between the summer monsoon in South Asia and the desert climate in West Asia is shifting north-westward, posing a significantly enhanced risk of floods over Pakistan and North- Western India.

Raghu Murtugudde, Climate Scientist, Emeritus Professor, University of Maryland & Retired Professor, IIT-Mumbai, explains: “The rapid warming over the Middle East (West Asia) and the Mediterranean is a signature of global warming. This regional warming has been pulling the southwestern winds northward over the Arabian Sea. There is excess moisture being pumped into the Himalayan foothills. Similar conditions are being cited during the ongoing seasons as well. Because of this northward shift of the south-westerly winds, we might end up with more heavy rainfall events all the way into Himachal Pradesh and Leh Ladakh before the season is over.”

Moisture supply for the summer rainfall along the west coast of the Indian subcontinent is mainly transported from the Arabian Sea by the low-level jet (LLJ). LLJ is a fast-moving ribbon of air in the low levels of the atmosphere. The LLJ also feeds on the cross-equatorial southerly winds, which transport moisture and support the convection over the entire Indian monsoon region.

The West Asia warming is almost two times faster than other inhabited parts of the world. The warming has led to a poleward (northward) shift of the low-level jet over the Arabian Sea, causing a dramatic increase in atmospheric instability by thrusting moisture supplies northward. Consequently, the regions of Northwest India and Pakistan become unstable and favourable for deep convection (unprecedented rainfall).

In addition, the LLJ is accompanied by strong westerly winds and a pronounced positive vorticity (vorticity is a clockwise or counterclockwise spin in the troposphere), which provides a track for the invasion of the low-pressure systems into the region. This, additionally, transports moisture from the Bay of Bengal to further nourish the floods.

As a consequence, the summer rainfall is intensified over Pakistan and Northwestern India, which is roughly confined to 20°N−30°N and 65°E−78°E.

In summary, the sustained effects of spring land heating push the LLJ to the north, leading to an increase in vorticity and moisture supply to northwestern India and Pakistan, which eventually leads to enhanced rainfall over these regions during summer.

Himalayan Threats & Urgency of Monitoring Glaciers

The increase in rainfall extremes in high-elevation regions of the Northern Hemisphere is amplified, averaging 15% per degree Celsius of warming—double the rate expected from increases in atmospheric water vapour, according to a recent study, ‘Global warming intensifies rainfall in mountainous regions’. Moreover, more instances of extreme precipitation are in the form of rainfall than in snow. This is mainly because the zero-degree isotherm, the freezing level at which precipitation falls as snow, has moved to a higher elevation because of global warming. Now, most of the snow-bearing areas are witnessing rainfall. High-altitude regions are pinpointed as ‘hotspots’ that are vulnerable to future risk of extreme-rainfall-related hazards.

Experts have already warned against more intense rainfall bringing a greater risk of landslides in high-elevation regions, demanding the development of specific mitigation and adaptation plans at a faster pace. Due to climate change, hazards, such as glacier retreat, permafrost degradation and lake shrinkage, occur frequently in high altitude regions, often leading to slope instability and an increase in the occurrence of deep-seated landslides.

According to a research study, ‘Increase in occurrence of large glacier‐related landslides in the high mountains of Asia’, a total of 127 landslides were detected in the Landsat images of the study area, covering the period from 1999 to 2018. The landslides are mainly concentrated in the Karakoram Mountains, eastern part of the Pamir Mountains, western Himalayas and south of the Hindu Kush.

Subimal Ghosh, Institute Chair Professor, Department of Civil Engineering & Convener, Interdisciplinary Program in Climate Studies-IIT Mumbai, says: “With per degree centigrade warming, the extreme precipitation increases by seven to eight percent, and this is what we are witnessing at present. With climate change, extreme weather events are increasing and will continue to rise in the coming years as well. We have to equip ourselves in a better way, so that we can really manage the increasing extremes. We should have early warning systems and better adaptation designs, which are very much needed at the moment.”

Ghosh added that “it is very important to  have floodplain zoning and to identify the regions that are extremely prone to flooding. If there is an early warning of extreme precipitation, immediately carry out evacuation from the region under the extreme flood zone. We should learn from how we have handled cyclones. We need to list the places according to the danger levels and that is how only we can save people.”

Under the influence of global climate change, the Himalayas are warming at three times greater than the global average rate. Rising temperatures have intensified the problem by accelerating the melting of Himalayan glaciers and loss of snow cover. This rapid melt fills glacial lakes more quickly, increasing the risk of overflow and downstream flooding. Additionally, the thinning of glaciers contributes to the destabilisation of mountain slopes.

Further, rampant development of infrastructure, such as hotels, tunnels, roads, and hydropower projects in the ecologically sensitive region, has aggravated the situation and economic losses.

Commenting specifically on Uttarakhand, YP Sundriyal, Adjunct Faculty- Geology, Doon University, Uttarakhand, says: “The role of global warming is already established in the rise of extreme weather events. We did not learn anything from the past disasters in 2013 (Kedarnath) and 2021 (Rishiganga). Why have there been no checks on unplanned construction in the region?”  

He highlighted that “ecologically, the Himalayas are very fragile as these are the youngest mountain range in the world. This makes it a very sensitive region. The authorities concerned and local bodies should include scientists while carrying out any construction in the region, as they are well-versed in the geology. When such torrential rainfall occurs over hill slopes, it becomes more dangerous as debris flow leads to erosion due to landslides, making flash floods more powerful and disastrous.”

Sharing his views on the Dharali disaster, Anjal Prakash, Clinical Associate Professor (Research) and Research Director, Bharti Institute of Public Policy, Indian School of Business and IPPC author, said “such devastating events in Uttarkashi and other hilly regions highlight the increasing frequency of cloudbursts and flash floods driven by climate change. Unfortunately, India is not doing enough to develop climate-resilient infrastructure that can withstand these extreme weather events. To safeguard communities and manage natural resources better, it is crucial to invest in adaptive infrastructure and establish more monitoring stations in the Himalayas and their upper reaches. Enhanced surveillance and early warning systems are vital in addressing the increasing frequency of extreme weather events like cloudbursts and flash floods. “

He further added, “Without immediate action, these disasters will only become more frequent and severe, risking lives, homes, and livelihoods. Automatic Weather Stations (AWS) play a vital role by providing real-time data from the Himalayas, especially in their upper reaches. This information helps authorities issue timely alerts, enabling communities to prepare and evacuate in advance, thus saving lives and reducing damage. Given the rising intensity of climate-induced disasters, India must expand its network of AWS and invest in advanced forecasting technology to build a more resilient and prepared society.”

The Wadia Institute of Himalayan Geology have observed that glaciers in the Garhwal Himalaya show significant heterogeneities in glacier thinning and surface flow velocity patterns. The observations show an overall retreat of glaciers with variable rate of melting and retreat based on different facets like topography (elevation, aspect and slope), climate (temperature and precipitation) and debris cover. The observed retreats are 15-20 m/year for the Dokriani Glacier in Bhagirathi basin, 9-11 m/year Chorabari Glacier in Mandakini basin, 12 m/year at Durung-Drung and ~ 5.6 m/year at Pensilungpa glaciers in Suru basin.

The writer is a freelance journalist.