Nepal Flood Disaster: 160 Dead, Hundreds Missing as Glacial Lake Risks Mount

A devastating flood has swept through Nepal, killing at least 160 people and leaving hundreds missing, while also destroying vital infrastructure including bridges, roads, and hydropower facilities. The sudden torrent of water and debris tore through settlements near the Nepal-China border and flowed downstream through three districts, underscoring the region's vulnerability to sudden Himalayan disasters.

Initial assessments suggest the flood was triggered by an ice-and-rock avalanche from a glacier on the Nepal side. This avalanche is believed to have blocked a tributary of the Bhote Koshi river, leading to a catastrophic surge downstream. While the disaster does not appear to have been caused by a burst glacial lake, it serves as a stark reminder of how events high in the mountains can impact communities below with little warning.

The flood struck Timure near Rasuwagadhi on the morning of August 26, before surging through the Bhote Koshi and into the Trishuli river system. Notably, no rainfall had been reported in the affected area, meaning residents were caught completely unaware. Hydrological observations revealed the flood wave's exceptional speed and scale, with water levels in the Trishuli river rising by as much as nine meters within half an hour at one point.

Beyond the immediate tragedy, a joint inventory by the International Centre for Integrated Mountain Development (ICIMOD) and the UN Development Programme has identified 47 glacial lakes across the Koshi, Gandaki, and Karnali river basins as potentially dangerous. Of these, 21 are located in Nepal, with others in China and India. The Koshi basin alone contains 42 of these high-risk lakes. Four specific lakes in Nepal, Thulagi, Lower Barun, Lumding Tsho, and Hongu 2, have been prioritized for urgent risk-reduction work.

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468 tourists and travellers are missing, including 75 Nepali nationals.