Seasonal Glacier Water Supply Becoming Less Reliable for Cities in Asia

Nature Communications, 15 May 2026

Glaciers and snowpack currently help reduce water shortages for many downstream cities of Asia by supplying additional water during dry seasons. However, this relief is projected to sharply decline over coming decades. The number of urban residents facing water scarcity across the region could increase by 31-53% by 2050, depending on the degree to which fossil fuels continue to be used, while future meltwater gains are projected to offset only a small fraction of growing demand. Rising temperatures today are shifting more meltwater into the monsoon season, when rainfall is already plentiful, while reducing meltwater availability during other times of year when cities need it most. As a result, the ability of glacier and snow melt to buffer drought and urban water stress is expected to weaken substantially in the future. These findings highlight the need for water management and urban planning strategies that account for changing seasonal water supply patterns across Asia’s major river basins.

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