Bhutan GLOF Unleashes Flash Flood Threat in India, Swallowing Historic Hot Spring

A sudden and powerful Glacial Lake Outburst Flood (GLOF) from Shintaphu Lake in Bhutan's Gasa district has sent torrents of water surging downstream, completely wiping out the historic Gasa Tshachu Hot Spring on the Mo Chhu River. The incident, which occurred on October 29 evening, has triggered urgent flash-flood alerts across several districts in India's West Bengal and Assam, prompting immediate evacuations and heightening cross-border disaster preparedness. No casualties have been reported so far, thanks to timely warnings. This latest GLOF underscores the increasing vulnerability of the Himalayan region to such climate-change-driven events, with Shintaphu Lake identified as one of Bhutan's potentially dangerous glacial lakes. The floodwaters are now moving through interconnected river systems, including the Sankosh River, which flows into the Brahmaputra, directly impacting communities in downstream Indian states. Authorities in West Bengal Alipurduar district and Assam Dhubri are on high alert, with Assam Chief Minister Himanta Biswa Sarma confirming that teams, including the National Disaster Response Force (NDRF), are mobilized and ready to respond. As the National Center for Hydrology and Meteorology (NCHM) in Bhutan continues to monitor the Mo Chhu river levels, the immediate focus remains on managing the downstream flow and ensuring the safety of residents along riverbanks in both countries. Repair work is also underway in Bhutan where the flood damaged a crucial solar irrigation project and blocked parts of the Punakha-Gasa Highway. This event serves as a stark reminder of the critical need for enhanced early-warning systems and robust cross-border cooperation to mitigate future GLOF risks in the shared Himalayan ecosystem.