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Nepal floods of 2026
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Aerial view of houses partially submerged in muddy floodwater along a river in Trishuli Bazar, Nepal, with debris and damaged buildings surrounded by green hills. Aerial view of houses in Devighat, Nepal, surrounded by thick gray sludge after flash floods, with mud covering buildings and debris scattered across the area. Diagram showing a mountain glacier collapse in which melting ice destabilizes rock, triggering a rockslide that changes the ice into water to flood the valley below with water, mud, and debris. Rows of damaged residential buildings in Devighat, Nuwakot, Nepal, with debris, mud, and broken structures visible after devastating flash floods.
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Aerial view of houses partially submerged in muddy floodwater along a river in Trishuli Bazar, Nepal, with debris and damaged buildings surrounded by green hills.
The partial collapse of a mountain glacier sent a massive surge of water down the Trishuli River on August 26, 2026. A flood of gray-brown water mixed with sediment, melting ice, rock, and other debris swelled the river to at least 230 feet (70 meters) above normal levels within the high mountain gorges and caused water to rise by roughly 30 feet (9 meters) in 30 minutes downstream.

Nepal floods of 2026

natural disaster, Asia
Written by
John P. Rafferty
John P. Rafferty writes about Earth processes and the environment. He serves currently as the editor of Earth and life sciences, covering climatology, geology, zoology, and other topics that relate to...
John P. Rafferty
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Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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Nepal floods of 2026, catastrophic flash flood and debris flow triggered by the partial collapse of the glacier sitting atop Langtang Lirung peak in Langtang National Park, Nepal, that devastated a river valley shared by Nepal and China on August 26, 2026. At least one smaller flood resulted from the breach of a temporary barrier lake (a lake formed by debris that cut across an existing stream) that was created by the initial surge. In...

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