Months before Nepal floods, reports flagged livelihood threat from rapid glacier loss in Hindu Kush Himalaya

Key Points:

• Two reports by the International Centre for Integrated Mountain Development (ICIMOD) warned months ago about accelerating glacier melt in the Hindu Kush Himalaya, highlighting threats to the livelihoods of nearly two billion people downstream.
• The Hindu Kush Himalaya glaciers are melting at double the rate since 2000, with a total ice thickness loss of up to 27 meters since 1975, raising concerns about water security in the region.
• The region contains over 63,700 glaciers feeding ten major Asian river systems, but about 78% of the glacier area between 4,500 and 6,000 meters elevation is highly vulnerable to warming, described by ICIMOD as a “crisis unfolding in real-time.”
• The recent devastating flash floods in Nepal and Tibet, which killed at least 800 people and left over 3,000 missing, were likely triggered by a glacial avalanche where a large glacier section broke free, creating a temporary dam that eventually burst and caused a deadly surge of water and debris.
• Glacier losses are unevenly distributed, with the highest percentage loss in the eastern Hengduan Shan mountains and the largest absolute losses in the Indus, Ganges, and Brahmaputra basins, underscoring the critical vulnerability of these vital water sources.