Sudden deluge from Tibet sweeps through the Bhote Koshi river, killing at least seven, destroying villages, roads and power projects while authorities scramble to reach cut-off communities in Rasuwa and Nuwakot.

A massive flash flood originating from the Tibetan side of the border tore through Nepal’s Rasuwa district on Wednesday morning, devastating riverside settlements, washing away critical infrastructure and leaving at least seven people confirmed dead with dozens more missing. The sudden surge in the Bhote Koshi River, which entered Nepal around 9 AM, battered the border towns of Timure and Syaphrubesi before racing downstream into Nuwakot and beyond, triggering high alerts across five districts.

The scale of destruction became clearer as the day progressed. Market areas, homes, vehicles, bridges and hydropower facilities were swept away or severely damaged. Security posts were inundated, and communications with several locations remained severed for hours. Families in the affected zones described watching relatives carried off by the waters, while rescue teams struggled against high water levels and blocked access routes.

Sudden Surge from Across the Border

Local officials and the Department of Hydrology and Meteorology confirmed that the flood did not result from heavy rainfall inside Nepal. Precipitation in Rasuwa over the preceding 24 hours remained light, under seven millimetres in most places. Instead, authorities pointed to an event on the Chinese side of the border. Preliminary assessments suggested either a glacial lake outburst flood or a landslide that temporarily dammed a river before releasing a sudden wall of water.

The flood reached Timure and Syaphrubesi first, areas that form the main gateway for trade with Tibet’s Gyirong county. Rasuwa Chief District Officer Narendra Pariyar described the volume of water as unprecedented. “There could be heavy casualties or loss of property,” he told reporters, while urging residents along the Bhote Koshi and Trishuli rivers to move to higher ground immediately.

Across the border, Chinese state media reported major casualties and missing persons after a mudslide struck Gyirong port, cutting roads, power and communications in parts of the Shigatse region. Chinese President Xi Jinping called for all-out search efforts and stronger early-warning systems to prevent secondary disasters.

Casualties and Missing Persons

By Wednesday afternoon, at least seven to eight bodies had been recovered, most of them found along the Trishuli River banks in Nuwakot. Three unidentified bodies were retrieved near Simchaur and Kolputar. The final death toll remained uncertain as many areas stayed inaccessible.

Dozens of security personnel and government staff were unaccounted for. Nine Armed Police Force members stationed at the Timure border outpost were reported missing. Nepal Police figures indicated between 26 and 32 personnel out of contact, including those from posts in Timure, Syaphrubesi and Rasuwagadhi. Fourteen employees of the Rasuwa Customs Office in Timure remained missing, though 25 others, including the chief customs officer, had been located.

In Nuwakot, residents recounted harrowing scenes. Yugnath Adhikari of Dandathok said he watched helplessly as the flood carried away his two sisters, nephew and the nephew’s wife. Ward officials reported scores of houses destroyed between Sole Bazar and Akkare Bazar, with elderly residents and children among those still untraced. Students from local schools were caught in the flood while travelling, though some who had already reached classrooms remained safe.

Infrastructure and Economic Impact

The flood inflicted severe damage on transport and energy infrastructure. A newly rebuilt Friendship Bridge at Rasuwagadhi, reconstructed after last year’s flood, was washed away once again. Approximately 42 kilometres of the road linking Nuwakot to the China border were destroyed or rendered impassable, severing a key trade corridor. Two motorable bridges near Trishuli Bazaar were also swept away, and around 60 houses in that area alone were destroyed.

Hydropower facilities bore a heavy blow. Nepal’s Energy Ministry reported that roughly 430 megawatts of generation capacity – more than 12 per cent of the country’s total installed hydropower – was disrupted. Projects including those at Trishuli, Devighat and several others in Rasuwa and Nuwakot suffered damage. A 25-megawatt solar plant also lost three blocks and a substation. Preliminary estimates suggested that more than 700 megawatts of operational and under-construction capacity across a dozen projects had been affected.

Timure Bazaar and the adjacent customs area were left in ruins, with vehicles and goods swept downstream. The Area Police Office in Timure and police posts in Syaphrubesi and Rasuwagadhi sustained heavy damage. In Nuwakot, the administrative building of the Central Prison and a police security unit were partially affected, though inmates were moved to safer blocks.

Rescue and Relief Operations

Prime Minister Balendra Shah moved quickly to coordinate the response. He ordered the immediate mobilisation of the Nepali Army, Nepal Police and Armed Police Force, directing that residents in lower-lying areas be shifted to safer locations. Two Army helicopters carrying medical teams were dispatched early, later joined by additional military and private-sector aircraft. By afternoon, four Army and eight private helicopters were operating in the zone. The Army reported airlifting at least 12 people from Syaphrubesi, Mailung and Dhunche, while other teams rescued five more who were taken to hospital in Bidur.

An emergency Cabinet meeting convened later in the day and took ten decisions to intensify rescue, relief and recovery. Affected local levels were declared disaster crisis zones for three months. The ministries of home affairs, defence, infrastructure, energy and information were instructed to restore roads, electricity, water and telecommunications as rapidly as possible.

The National Disaster Risk Reduction and Management Authority coordinated with the Red Cross, Nepal Scouts and medical teams. The World Health Organisation prepared to send medicines, equipment and emergency tents for around 1,000 people. The Health Ministry reserved 100 emergency beds at Bir Hospital and the Trauma Centre in Kathmandu and dispatched doctors, nurses and an ambulance with supplies.

Downstream Alerts and Continuing Uncertainty

The Flood Forecasting Division tracked the surge as it moved into the Trishuli basin, reaching Galchhi in Dhading by early afternoon and expected to pass Mugling later. High-alert advisories covered riverbanks in Rasuwa, Nuwakot, Dhading, Gorkha and Chitwan. Authorities recommended temporary closure of sections of the Prithvi Highway and the Mugling-Narayangadh corridor. Travellers were advised to avoid riverside routes entirely.

Many questions remained unanswered. The precise trigger in Tibet had not been confirmed, though satellite data and informal reports pointed to a glacial lake or landslide-related event similar to the deadly 2025 Bhote Koshi flood that killed nine and left 24 missing. The full extent of damage in the worst-hit pockets of Syaphrubesi and Timure was still being assessed because high water and debris continued to hinder ground access. Contact with some villages remained intermittent.

Families waited for news of missing relatives, while the government prepared for a prolonged recovery effort in a region still reeling from last year’s disaster. The flood has once again underscored the vulnerability of Nepal’s northern border communities to sudden Himalayan hazards that originate beyond its control.