Himalayan glaciers melting 65% faster, threatening India's economy and hundreds of millions

The Himalayas are melting faster than they were ten years ago—65% faster, according to new research released this week. Glaciers across the range are shedding mass at an accelerating pace, leaving behind expanding lakes held back by unstable walls of rock and ice. Warming temperatures are thawing permafrost that has been frozen for millennia. High mountain slopes are becoming unstable. The physical landscape of the world's third-largest concentration of ice is changing in ways that are difficult to predict and harder still to monitor.

Yet the monitoring itself is almost nonexistent. Of an estimated 40,000 glaciers across the Himalaya-Karakoram region, only about 21 are being tracked in any sustained, detailed way. This gap matters enormously because the risks are no longer theoretical. In 2021, a glacial lake burst its natural dam in Uttarakhand, sending a massive flood through the Rishiganga and Dhauliganga valleys and killing more than 200 people. Two years later, a similar disaster in Sikkim killed at least 70 more. More recently, devastating floods across Nepal and Tibet claimed over 1,300 lives. The Indian government has now classified 56 glacial lakes as "very high risk" following a 2025 assessment of 189 dangerous lakes in the Indian Himalayan region alone.

The danger extends far beyond the immediate threat of catastrophic floods. The Himalayas function as a vast natural water system, feeding rivers that sustain hundreds of millions of people across South Asia. A new report by the global consultancy Systemiq, produced with the Integrated Mountain Initiative and technical input from the International Centre for Integrated Mountain Development, estimates that Himalayan water underpins roughly 20% of India's GDP. That water supports wheat and rice cultivation, tea plantations, hydropower generation, and pilgrimage economies. Yet the mountain states themselves capture only about 5% of that economic value, meaning the wealth flows elsewhere while the risks remain local.

The timing of this acceleration matters. Scientists expect "peak water"—the point at which glacier runoff reaches its maximum before declining as glaciers lose mass—to arrive around mid-century in most Hindu Kush Himalayan river basins. After that threshold, the rivers that have sustained civilizations for millennia will carry less water. The transition will be gradual but consequential. Lord Nicholas Stern, chair of the Grantham Research Institute on Climate Change and the Environment at the London School of Economics, described the Himalayas as "the Third Pole." Unlike the Arctic or Antarctic, he noted, this pole has hundreds of millions of people living beneath it, dependent on its water and its stability.

Not all the forces driving this melt are beyond the region's control. The Systemiq research estimates that roughly one-third of Himalayan glacier loss is driven by black carbon—soot particles that originate largely from brick kilns in the plains below. When this soot settles on snow and ice, it absorbs more sunlight and accelerates melting. Unlike global greenhouse-gas emissions, which require international coordination to address, black-carbon pollution is something India and its neighboring countries can act on directly, through regulation and investment in cleaner industrial practices.

The report proposes ten priority transitions. Reducing black-carbon emissions ranks high. So does expanding glacier monitoring—a relatively straightforward technical challenge compared to the political and economic shifts required elsewhere. Improving disaster early-warning systems is another, as is rethinking how tourism develops in the mountains. The Indian Himalayan region receives roughly 400 million tourist visits annually. The research suggests that the goal should shift from maximizing visitor numbers to generating economic value that stays and is reinvested locally, building resilience rather than extracting wealth.

Perhaps the most urgent priority is one that transcends borders. Glacial lake outbursts, permafrost thaw, and cascading hazards do not respect the lines drawn across maps. Pema Gyamtsho, director general of ICIMOD, emphasized that no single country can address these risks alone. Cross-border monitoring systems, shared risk information, coordinated early-warning networks, and joint investment in resilience are becoming not luxuries but necessities—not merely to save lives in the immediate aftermath of disasters, but to protect the livelihoods and economic stability of the hundreds of millions who depend on the mountains' water and stability in the decades ahead.