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Sudden Flash Flood From Tibet Devastates Nepal Border Settlements

Officials are probing a likely transboundary trigger such as a glacial lake outburst because damage to hydropower and roads is hampering rescue and threatening downstream communities.

Overview

  • A sudden surge entered the Bhote Koshi River from the Tibetan side around 9 a.m. on Wednesday and swept through Rasuwa district, heavily damaging Timure and Syapru Besi and sending floodwaters into the Trishuli basin.
  • Rescue operations by the Nepal Army, Armed Police Force and Nepal Police are ongoing with helicopters deployed but access remains difficult and dozens of security personnel are reported missing.
  • At least eight deaths have been confirmed and a preliminary Nepal Tourism Board list shows 384 travellers unaccounted for, including 291 foreign nationals and 105 Indians, with consular hotlines activated.
  • The Nepal Electricity Authority reported damage to multiple hydropower and transmission sites, including six major facilities, producing large electricity and transport disruptions downstream.
  • Authorities say local rainfall did not cause the surge and are investigating causes such as a glacial lake outburst flood, a landslide or an avalanche or earthquake-triggered event while downstream districts and neighbouring Indian states remain on high alert.