Flash Flood Warning
In short
A glacial lake breach in Bhutan has released approximately 7.4 million cubic metres of water, triggering flash flood warnings and high alerts in Bengal and Assam as of 29 October 2026.
What is happening
A late-night breach of a glacial lake in Bhutan has caused severe flooding in the Gasa district. This event has put neighbouring regions in India, specifically Bengal and Assam, on high alert due to the potential surge of water.
When
The glacial lake breach occurred on the night of 29 October 2026.
Why it matters
Sudden releases of water from glacial lakes can cause violent, rapid flooding that threatens lives and infrastructure downstream. Early warning systems in Bhutan have helped officials evacuate vulnerable areas before the main surge arrived.
Easy to mix up
A flash flood warning is different from a flood watch; a warning means flooding is imminent or occurring, while a watch means conditions are favourable for flooding.