Satellite Images Reveal Scale of Devastating Nepal Flash Floods

Satellite images capture the catastrophic scale of flash flooding in Nepal, where a disaster along the Bhote Koshi River left villages submerged and critical infrastructure severely damaged. According to Planet Labs imagery shared by Nepal’s National Disaster Risk Reduction and Management Authority (NDRRMA), before-and-after photographs document sweeping destruction across northern valleys near the Tibet border.

The flash flood struck on Wednesday, originating from a sudden deluge in the Bhote Koshi River. The disaster resulted in a rising death toll and hundreds of missing persons as heavy currents swept through villages, roads, bridges, and hydropower facilities.

Satellite data and preliminary research published by the International Centre for Integrated Mountain Development (ICIMOD) indicate that an ice-rock avalanche near the Nepal-China border triggered the surge. Researchers examining video footage and field reports state that a massive volume of ice and rock debris entered the Lende Khola, a tributary of the Bhote Koshi River, creating a sudden flow of water, sediment, and large boulders downstream.

Village Devastation and Missing Persons

The floods heavily impacted the Rasuwa, Nuwakot, and Dhading districts, wiping out settlements along a 60-kilometer stretch from Xylong in Tibet down to Betrawati and Devighat. According to the Nepal Tourism Board (NTB), a total of 384 travelers—including 291 foreign nationals and 93 Nepalese citizens—went missing in the Rasuwa district floods.

Among those unaccounted for are at least 105 Indian nationals and 37 Non-Resident Indians (NRIs), according to figures released by the NTB. Planet Labs imagery highlights specific areas of severe impact, including the villages of Khadga Bhanjyang, Timure, Syapru Besi, and Haku Besi, where market areas and local infrastructure were largely washed away.

Downstream Alerts and Regional Response

Rescue operations in Nepal faced severe disruptions due to bad weather and collapsed communications networks. Prime Minister Balen Shah received a direct call from Indian Prime Minister Narendra Modi, who assured him of all possible humanitarian assistance and coordinated support for ongoing search-and-rescue missions, according to statements posted on X.

Downstream in India, the National Disaster Response Force (NDRF) deployed teams to vulnerable districts across Bihar and Uttar Pradesh. According to an NDRF press release, the deployment followed an advisory from the Central Water Commission warning of a sudden water level spike in the Trishuli River at Furke Khola, roughly 160 kilometers from the Indian border, as the flood wave advanced through the Gandak River basin. Authorities advised residents near riverbanks to move to safer ground.