WhereIsAtlas · Natural disaster

Bhote Koshi Flood (2026)

A glacier collapsed high on the Nepal-China border and sent a wall of rock, ice and water down a valley — Nepal's deadliest disaster since 2015

Concluded — On 26 August 2026 a glacier collapsed near Langtang Lirung on the Nepal-China border and sent a debris torrent down the Bhote Koshi and into the Trishuli, sweeping away villages in Rasuwa district and killing at least 1,455 people. Nepal ended the active search-and-rescue phase on 5 October 2026; recovery and reconstruction are continuing.

Shortly before nine in the morning on 26 August 2026, a mass of glacier, rock and ice gave way high on the Nepal-China border near Langtang Lirung. The debris swept down the Lhende Khola and into the Bhote Koshi river, gathering mud, boulders and sediment as it went, and poured through the border settlements of Timure and Syabrubesi in Rasuwa district. From there it surged into the Trishuli and ran downstream through Nuwakot, Dhading, Gorkha, Tanahun, Chitwan and Nawalpur. On the Chinese side the torrent tore through Gyirong County, including the Gyirong Port border crossing.

The Bhote Koshi corridor is Nepal's principal overland trade route to China and the site of several hydropower projects, and the flood destroyed both. The Rasuwagadhi crossing was closed for a prolonged period, and hydropower plants with hundreds of megawatts of combined capacity were knocked offline. Entire settlements were lost. Nepal's disaster authority confirmed 1,455 deaths, with more than five thousand people still listed as missing in early October; among those out of contact in the first weeks were hundreds of foreign trekkers and workers on the route.

The United Nations described it as Nepal's deadliest natural disaster since the April 2015 earthquake, which killed around 9,000 people. The government formally ended active search and rescue on 5 October 2026, forty days after the flood, and shifted to rehabilitation. The International Centre for Integrated Mountain Development, the Kathmandu-based mountain research centre, described the event as part of a worsening pattern of cascading hazards in the Himalaya, and noted that the same river corridor had already flooded catastrophically in July 2025.

Quick facts

Date: August 26, 2026, at about 08:40 local time
Trigger: Glacier collapse and rock-ice avalanche near Langtang Lirung; debris flow down the Bhote Koshi
Confirmed deaths: 1,455 (Nepal disaster authority, early October 2026)
Still missing: 5,285 (early October 2026)
People rescued: 13,795
Location: Rasuwa district, then Nuwakot, Dhading, Gorkha, Tanahun, Chitwan and Nawalpur; Gyirong County in Tibet
Direct damage: Rs 274.48 billion (about US$1.9bn), joint Rapid Damage and Needs Assessment, 11 September 2026
Recovery estimate: Rs 723 billion (about US$4.8bn)
Significance: Nepal's deadliest disaster since the 2015 earthquake

Sources

Nepal ends search and rescue after flood, focuses on rehabilitation — Reuters (2026-10-17)
Nepal floods: UN steps up response after disaster kills more than 1,400 — UN News (2026-10-17)
Death toll from Nepal-Tibet flood passes 470 as barrier lake threatens — Al Jazeera (2026-10-17)
Bhote Koshi flood — official situation updates — Ministry of Home Affairs, Nepal (2026-10-17)
A pattern ignored: the Bhote Koshi disaster reveals Nepal's transboundary blind spot — Nepal News (2026-10-17)
Nepal-Tibet flood: hundreds still missing as families and officials work to identify bodies — FairPlanet (2026-10-17)
Tibet-Nepal floods put China's stark death toll gaps under the spotlight — IANS (2026-10-17)
Nepal floods: USGS confirms glacial collapse caused disaster — BBC News (2026-10-17)
Rescuers scour Nepal flood debris as death toll reaches 469 — The Daily Star (2026-10-17)
Nepal wraps up flood search, shifts focus to rehabilitation and reconstruction — New Indian Express (2026-10-17)
World Bank cuts Nepal growth forecast as floods disrupt economy — IANS (2026-10-17)
Nepal faces Rs 723 billion recovery bill after catastrophic Bhote Koshi flood — Nepal News (2026-10-17)
The Rs 1.5 trillion toll: the cumulative financial price of Nepal's decade of catastrophes — Nepal News (2026-10-17)
Bhote Koshi flood survivors to be shifted to temporary residence within six months — My Republica (2026-10-17)
Over 1,000 displaced still in holding centres — Rising Nepal Daily (2026-10-17)