Nepal flood highlights glacier risks in warming Himalayas: 'The new normal'

A devastating flash flood in Nepal, which claimed hundreds of lives and left over a thousand people missing, was likely caused by a massive chunk of glacier breaking off and temporarily blocking a river. Preliminary scientific investigations suggest this glacial dam then failed, unleashing water with enormous force downstream.

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If you look at the imagery it's like someone cut with a huge knife through the whole lower part and it fell off.

Scientists are currently analyzing satellite imagery and seismic data to reconstruct the exact sequence of events. The U.S. Geological Survey reported a magnitude 5.2 glacier collapse, noting the debris flow's catastrophic impact. Geoscientists describe the event as if a "huge knife" cut through the lower part of the glacier, causing a significant ice mass to fall from a great height, potentially creating an explosive effect.

While researchers caution against immediately attributing the catastrophe directly to global warming, they acknowledge that rising global temperatures, driven by human activities like burning fossil fuels, are increasing the likelihood of such disasters. The Hindu Kush Himalaya region is warming significantly faster than many other parts of the world.

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A mass of glacial ice dropping from a great height could have felt like a bomb exploding, resulting in the chaos that followed.

This region, spanning over 2,175 miles and containing vast ice reserves outside the polar regions, is the source of water for numerous rivers crucial to millions across Asia. A 2023 report warned that accelerating glacier melt poses a significant disaster risk to the 240 million people in the region and the 1.65 billion downstream. The recent flood has already caused widespread damage to homes and critical infrastructure across the Himalayan region.

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We have to be cautious and not draw a connection yet. However, rising temperatures are changing the Hindu Kush Himalaya region and melting glaciers.