On the morning of August 26, 2026, a catastrophic flash flood with ice, rock, and debris began affecting the Nepal–China (Tibet) border area. It flowed downstream into the Bhotekoshi and Trishuli rivers, sweeping away villages along the route, killing hundreds of people, and damaging infrastructure along a flood pathway about 80 km long.
Casualties
➣Dead body found: 1,385 Nepal (9/11)
➣Missing: 5,130
➣Wounded: 6,827
➣Rescued: 13,673
Property damage
Private Houses: 7,570Government Houses: 48
Schools: 18
Health facilities: 7
Roads: 55KM total damaged
Bridges: 37 concrete (33 total damage), 68 suspension
Hydropower stations: 13
Vehicles: Approximately 1,000+
Many towns and villages along the river route were swept away by the flood, reportedly killing hundreds of people and leaving thousands of people missing, including hundreds of foreign tourists.
Route
➣The flash flood originated by a glacier collapse from north side of Mt Langtang Lirung near Nepal-China (Tibet) border at around 8:37 a.m Nepal Time. This event generated an earthquake like effect, which USGS later classified as "landslide-generated seismic event" of M5.2 magnitude. The collapse triggered a high-speed ice-rock avalanche and debris flow that plunged into the valley below through Lhende Khola, Bhotekoshi, and Trishuli river systems.
➣ Flash flood with debris reached and destroyed Gyirong Port located on the Chinese side of border at 8:47AM.
➣It continued to Nepal through the Bhotekoshi River in Rasuwa District.
➣It then flowed downstream into the Trishuli River, affecting Rasuwa, Nuwakot, and Dhading districts.
➣ Ultimately, the flood water and debris reached the Narayani River in Chitwan District before continuing into Bihar, India.
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| Map of flood route, Source: Onlinekhabar.com |
Towns Impacted by flood
Tibet
Gyirong (Kyirong), Tibet (on Nepal-China Border)
Rasuwa district, Nepal:
Timure- Worst-hit; Nepal–Tibet border/Rasuwagadhi area
Rasuwagadhi- Border/customs area; severe infrastructure destruction
Syabrubesi (Syafrubesi) - Major town; extremely severe flooding
Mailung - Major damage to homes, roads and farmland
Hakubesi - Riverside settlement affected
Shantibazar - Riverside settlement affected
Pairebesi - Flood/debris impacts
Khalti Basti - Riverside settlement affected
Sole - Affected along the river corridor
Nuwakot District:
Betrawati -Major downstream impact; houses/bridges damaged
Trishuli Bazaar - Major town; extensive inundation and destruction
Battar - Affected by downstream Trishuli flooding
Ruwakot - Riverside settlement affected
Majhimtar - Riverside settlement affected
Dhading District:
Galchhi - Major downstream town; bridge/road damage
Gajuri - Flooding and damage along Trishuli
Malekhu - River rose above danger level; flooding around market
Chitwan District:
Muglin - Downstream warning/impact; substantially less destruction than upstream
Response
Rescue and relief operations are underway, with authorities and emergency responders working to locate missing people, evacuate affected communities, and provide assistance to those impacted by the disaster.
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