On 26 August 2026, a devastating and sudden-onset flash flood occurred in the Bhote Koshi River, following a powerful surge of water, sediment, ice, rocks, and debris from the upstream Himalayan catchment in Tibet/China, reportedly associated with a major ice-and-rock avalanche/landslide. The flood rapidly travelled downstream through the Bhote Koshi and Trishuli river systems, severely affecting communities in Rasuwa, Nuwakot, Gorkha and Dhading, including settlements, market places and travellers in and around the Rasuwa–Gosaikunda area, while posing continuing risks to downstream communities towards Gorkha, Chitwan, Nawalparasi and along the Trishuli and Narayani corridor.
As of the latest NDRRMA update-5, 165 bodies have been recovered, 73 injured people are receiving treatment, and 823 people are reported missing. Among those missing are 44 Nepal Army personnel, 13 Armed Police Force personnel and 28 Nepal Police personnel who were working in the affected areas. According to the Nepal Tourism Board, 579 people, including 466 foreign tourists and 113 Nepali tourists, who had travelled to Gosaikunda and surrounding areas remain out of contact. The Government has mobilized 7,415 security personnel for search and rescue, and 239 people have so far been rescued by helicopter operations. These figures remain preliminary, and the full scale of casualties, displacement and losses is yet to be established as access to affected areas improves.
The Government, security forces, local authorities, Nepal Red Cross, UN agencies and humanitarian partners are leading the initial response, but the scale of the disaster and access constraints are likely to exceed available local capacity. Significant gaps remain in reaching remote communities and in reliable information on affected and displaced populations, sectoral needs, infrastructure damage and vulnerable groups.
For ACT Alliance Nepal Forum, the immediate priority is to ensure rapid, coordinated needs assessment and targeted support to underserved communities, particularly in emergency shelter/NFIs, WASH, food, health, education, protection and early recovery, while avoiding duplication with the Government-led response.