39 Australians missing as Nepal floods kill hundreds

By Simon Wu · 2026-08-28

A valley swallowed in thirty minutes

The Trishuli River at Galchchi station rose nine metres in thirty minutes.^[1] At Malekhu, seven metres in the same window. Those numbers, recorded by hydrological sensors along Nepal's Rasuwa district on 26 August 2026, describe a valley floor remade in a single event.

359 bodies had been recovered from the river areas of Rasuwa district by 27 August 2026, with the overall death toll across Nepal and Tibet approaching 469.^[2] Hundreds more remain unaccounted for. The flood hit during the peak Himalayan trekking season, when pilgrims and adventure travellers fill the border corridors en route to Mount Kailash and Lake Manasarovar.

Ice, rock and an avalanche trigger

Scientists at the International Centre for Integrated Mountain Development (ICIMOD) are analysing satellite and seismic data to understand how an ice-rock avalanche in the Lhende Khola set off the cascade.^[1] Nepal's monsoon, which runs June to August, swells rivers and accelerates glacial melt across the Hindu Kush Himalaya, compressing the margin between a stable glacial lake and an outburst flood.

Copernicus Sentinel-2 satellite imagery, comparing scenes from 12 August and 27 August, shows the river channel near Betrawati and Gerkhu had widened markedly, with extensive sediment deposits blanketing the valley floor.^[3] The visual record confirms what the hydrological data suggested: a single event reshaped the terrain.

A second flood is imminent

A debris blockage lodged on the Nepal, China border has formed a new glacial lake upstream, and authorities have issued evacuation orders for Jilong port in anticipation of a second surge. Qianggong Zhang, Head of Climate and Environmental Risks at ICIMOD, said the blockage still lodged upstream means a second flood is imminent, with evacuation orders now in place for Jilong port.^[1]

ICIMOD Director General Pema Gyamtsho said the organisation stands in solidarity with the people and Government of Nepal, with thoughts for the victims, their families and all those affected, and is committed to providing support wherever possible.^[1] Temporary landslide dams in narrow Himalayan valleys can release without notice once water pressure or seismic activity destabilises the debris barrier, giving downstream communities very little warning time.

39 Australians unaccounted for

Nepal's Ministry of Foreign Affairs listed 35 Australians among the foreign nationals still missing in the Bhote Koshi River flood as of 27 August.^[2] The Department of Foreign Affairs and Trade revised that figure upward the following day. As of 28 August, DFAT confirmed at least 39 Australians are among those reported missing in the Nepal, China floods.^[4]

Foreign Affairs Minister Penny Wong said Australian officials are working urgently to confirm the welfare of those affected and provide assistance.^[4] DFAT is deploying a Crisis Response Team member and a Regional Consular Officer to Kathmandu to support affected Australians and their families.^[4]

Families in Australia seeking information can call the Consular Emergency Centre on 1300 555 135, or +61 2 6261 3305 from overseas. The Australian Embassy in Kathmandu can be reached directly on +977 1 437 1678.^[5] The Smartraveller advisory for Nepal remains active, and travellers and their families are advised to check it for updated guidance.

Simon Wu

Simon Wu writes about Asia-Pacific markets and China's economy. He reads the Chinese-language financial press closely and looks for the stories that reach Australia before anyone here notices.