What triggered the Rasuwa flood? Scientists piece together a complex chain of events
Summary
Scientists say a glacier and rock collapse in Tibet-linked high mountain terrain triggered the deadly Rasuwa flash flood, which sent water and debris racing through the Bhotekoshi and Trishuli river systems. The disaster has killed 579 people so far, with experts still examining whether warming conditions helped destabilise the slope.
Key Points
- A massive glacier-and-rock collapse near the Nepal-China border is now believed to have triggered the Rasuwa flash flood.
- Scientists say the collapse blocked the Lhende Khola, formed a temporary dam, and then unleashed a sudden downstream surge.
- Officials and researchers caution that climate change may have contributed to the instability, but a direct link has not yet been established.
- The flood’s warning window may have been only minutes, raising concerns about how alerts can reach communities in time.
