Kathmandu: A powerful and sudden flash flood has swept through Nepal’s northern Rasuwa district near the border with Tibet, destroying settlements, markets and important infrastructure and leaving authorities racing to find missing people and assess the full scale of the disaster.
The flood entered the Bhotekoshi River area at around 9 am on Wednesday and quickly moved through the Timure and Syabrubesi areas. The sudden rise in water caught many people by surprise and caused widespread destruction along the river corridor.
Officials have warned that the disaster could become even more dangerous as floodwaters move downstream through the Trishuli River system. People living near riverbanks in Rasuwa, Nuwakot, Dhading, Gorkha and Chitwan have been urged to move to safer and higher ground.
The exact number of deaths and injuries remains unclear. However, nine Armed Police Force personnel stationed in the Timure area have been reported missing after losing contact during the flood. Authorities are continuing efforts to establish contact with them and determine their condition.
Several police facilities have also suffered damage. These include the Area Police Office in Timure, the police post in Syabrubesi and the police post at Rasuwagadhi.
The destruction in Timure has also affected the important Nepal China border trade corridor. The Timure customs area was badly damaged, with reports that vehicles and goods stored there were swept away by the floodwaters. A bridge that had recently been constructed after damage from an earlier flood was also destroyed.
Syabrubesi and other nearby settlements have suffered heavy damage. Homes, shops and other buildings close to the river were affected as the water moved through the area with great force. Several infrastructure and hydropower projects are also reported to have suffered damage, although authorities have not yet completed a detailed assessment.
One of the most concerning aspects of the disaster is the sudden way in which the flood developed. Local officials said there was no major rainfall in the immediate Rasuwa area that could easily explain the enormous volume of water. This has led hydrologists and disaster officials to investigate whether the flood may have originated from a glacial lake or another sudden water release on the Tibetan side.
Officials are examining satellite information and working with authorities across the border to understand what happened upstream. A glacial lake outburst flood occurs when a large volume of water stored behind or near a glacier is suddenly released. Such events can send enormous amounts of water downstream within a very short period.
The possibility is particularly worrying because the same river corridor experienced a devastating flood last year. That disaster killed several people, left others missing and severely damaged infrastructure linking Nepal with China. The earlier event was associated with the sudden drainage of a glacial lake in Tibet.
Nepal has now launched a large emergency response. The Nepal Army, Armed Police Force and Nepal Police have been deployed for search, rescue and relief operations. Two Nepal Army helicopters have been sent towards the affected areas, while additional helicopters have been kept ready.
Medical teams and ambulances are also being mobilised. Disaster management authorities are coordinating with local governments and security agencies to evacuate people from vulnerable locations.
The downstream threat is another major concern. Floodwaters have already moved into parts of Nuwakot and Dhading, while authorities are closely monitoring the situation around the Trishuli River. People living near the Prithvi Highway and the Muglin Narayangadh road have also been warned because flooding and landslides could disrupt transportation.
The disaster comes at a difficult time for communities that are still recovering from previous floods and landslides. Roads, bridges, hydropower facilities and border infrastructure in the Himalayan region are particularly vulnerable because they are often built along narrow river valleys.
For now, rescuers are focused on finding missing people and reaching isolated communities. Officials are also trying to establish how much infrastructure has been destroyed and whether more dangerous flooding could follow.
The immediate priority is to protect people living downstream and prevent further loss of life. At the same time, the flood's unusual origin is likely to draw close attention from scientists and authorities because it raises broader questions about changing risks in the Himalayan region.
As rescue teams continue their work, Nepal faces the difficult task of dealing with a disaster whose full human and economic cost may not become clear for several days.