Overview
On 30 October 2026, a Glacial Lake Outburst Flood (GLOF) from the Sintaphu lake in Bhutan surged into the Mo (Mofu) River and moved downstream towards the Sankosh River. The rapid rise in water level prompted high‑alert warnings and evacuations in Alipurduar (West Bengal) and Dhubri (Assam).
Key Developments
- Water Resources Investigation and Development Minister Nisith Pramanik announced the outburst and ordered immediate evacuation of villages in the Sankosh catchment.
- State Disaster Response Force (SDRF) and National Disaster Response Force (NDRF) were placed on alert.
- Darjeeling MP Raju Bista urged vigilance in the hills, Terai and Dooars regions.
- Assam Chief Minister Himanta Biswa Sarma confirmed monitoring of downstream impacts in Dhubri and Kokrajhar districts.
- The Ministry of Jal Shakti issued an advisory to Assam and West Bengal on the GLOF threat.
- The IMD forecast heavy rain in Alipurduar on the same day, compounding flood risk.
Important Facts
• Approximately 7.4 million cubic metres of water escaped from the breached Sintaphu lake.
• The surge was expected to reach the West Bengal‑Assam border within 6–8 hours of the breach.
• Evacuation orders targeted riverbank villages in Alipurduar’s Rampur‑I gram panchayat, Tufanganj, Cooch Behar, and forest settlements along the Sankosh.
• The ongoing Punatsangchhu project raised additional security concerns.
Exam Relevance
The incident illustrates the nexus of environmental hazards and disaster management. Candidates should note:
- How GLOFs are linked to climate change and Himalayan glacial melt, a recurring theme in GS‑Paper III.
- The role of SDRF and NDRF in rapid evacuation and relief operations.
- Inter‑state coordination mechanisms, such as advisories from the Ministry of Jal Shakti, and the role of the IMD in issuing weather alerts.
- Strategic implications for cross‑border projects like the Punatsangchhu project, highlighting the need for risk assessment in international infrastructure.
Way Forward
1. Strengthen trans‑border early‑warning systems for Himalayan GLOFs through joint monitoring with Bhutan.
2. Enhance community‑level preparedness by regular drills and clear evacuation routes in flood‑prone river basins.
3. Integrate climate‑change projections into the design and operation of hydropower projects like Punatsangchhu.
4. Ensure coordinated response among SDRF, NDRF, and local administrations for swift relief.