Glacial Lake Outburst Flood in Bhutan Triggers High Alert in North Bengal
Glacial Lake Outburst Flood in Bhutan Triggers High Alert in North Bengal
IN · Published Oct 30, 2026
• A Glacial Lake Outburst Flood (GLOF) occurred at Lemthang in Bhutan, causing water to overflow downstream through the Mo Chhu River towards the Sankosh River.
• Authorities in North Bengal have issued a high alert, urging residents in vulnerable areas, including the Darjeeling hills, Terai, and Dooars regions, to relocate to safer locations.

Impact & Risks

The GLOF poses a significant risk to communities along the Sankosh River and its tributaries in North Bengal. Floodwaters may carry debris, including large pieces of wood and concrete, potentially damaging infrastructure and endangering lives. While no casualties have been reported, the situation remains critical, with a red alert in effect for the Sankosh River system. The intensity of water flow has slightly decreased, but the risk of flooding persists, necessitating continued vigilance and preparedness.

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