The Himalayas have experienced significant glacier shrinkage, marked by the greatest loss in ice mass and the largest reduction in glacier length. As glaciers retreat, many new glacial lakes are forming in places where ice once dominated. Researchers have predicted thousands of potential sites where these lakes might develop in the future, based on the landscape beneath the glaciers. These glacial lakes can be unstable, and sudden floods caused by their bursts have resulted in thousands of casualties, with the most severe incidents occurring in the Himalayan region. Glacial lake outburst floods (GLOFs) happen when large volumes of water are suddenly released from these lakes. Such events are mostly triggered by sudden inputs like avalanches or rockfalls into the lakes, but can also be caused by structural failures of the natural dams, earthquakes, or extreme weather. The complexity and rarity of these events, combined with their remote locations, make it challenging to accurately predict the risks. This is particularly important in the Himalayas, where a majority of hydropower plants are situated in areas vulnerable to GLOFs.
In which country do glacial lakes form a significant portion of the total water bodies?