Science

Himalayan Glacier Disaster Timeline (2021-2026): Nepal-Tibet Flood, GLOFs & Mountain Risk

On 26 August 2026 a glacier-and-rock mass collapsed on the Tibetan side of the Nepal border, fell about 1,200 m, blocked the Lhende Khola and then released a f…

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CHAMOLI 2021

Rock-ice avalanche off Ronti Peak devastates the Rishiganga valley

About 27 million cubic metres of rock and glacier ice detached from the steep north face of Ronti Peak and transformed into a highly mobile debris flow down the Ronti Ga…

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SOUTH LHONAK 2023

A true glacial lake outburst flood destroys Sikkim's Teesta III dam

Peer-reviewed research found that an unstable lateral moraine mass - up to 14.7 million cubic metres of frozen material - collapsed into South Lhonak Lake, generating a…

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THAME 2024

A two-lake GLOF cascade sweeps an Everest-region village

ICIMOD determined that a rock avalanche hit a glacial lake at about 4,900 m, producing a displacement wave that breached the lake and released roughly 156,000 cubic metr…

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RASUWA 2025

A transboundary supraglacial-lake outburst hits the Rasuwagadhi corridor

A flood wave surged down the Lhende River in Tibet, crossed the border at Rasuwagadhi and entered Nepal's Upper Trishuli. ICIMOD satellite analysis attributed it to the…

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ICIMOD 2026

Hindu Kush Himalaya ice-loss rates have doubled since 2000

ICIMOD's HKH Glacier Outlook 2026, synthesising 38 monitored glaciers, found that ice-loss rates have roughly doubled since 2000, with a marked acceleration after 2010,…

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NEPAL-TIBET 2026

A glacier and rock collapse blocks a river on the Nepal-Tibet border

At about 08:40 local time, satellite imagery indicates a large section of the lower end of a glacier detached at roughly 5,200 m on the Tibetan side and fell about 1,200…

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THE SURGE

The natural dam fails and the Trishuli rises 9 metres in 30 minutes

When the debris blockage failed, the ponded water released in a surge that picked up sediment and became a debris-laden flood down the Bhote Koshi. Downstream on the Tri…

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USGS CORRECTION

USGS: this was a landslide, not an earthquake

The USGS initially reported a magnitude-4.4 earthquake about 66 km north of Kathmandu. After analysing nearby seismic data, long-period seismic waves and satellite image…

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THE TOLL

At least 270 confirmed dead and close to 1,400 missing

As of 27 August 2026, Nepal reported at least 270 confirmed dead and about 826 missing, including roughly 600 foreign trekkers from more than 20 countries. Chinese autho…

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