The Bhotekoshi River burst its banks at around 9 a.m. local time on Aug. 26 in Rasuwa district and neighbouring areas of north-central Nepal. Water, earth and rock swept away villages, roads, bridges and hydropower installations. According to Nepali authorities and wire reports, the confirmed death toll — including losses on the Xizang side — stands at roughly 160 or more, with 95 bodies recovered in Rasuwa alone.

Nepali authorities listed 403 people as missing, 341 of them foreign nationals. Eighty-five security personnel are also unaccounted for: 44 from the Nepali Army, 28 from the Nepal Police and 13 from the Armed Police Force.

South Korean casualties

According to South Korea's foreign ministry, employees of Korean companies building a hydropower plant in the affected area were caught in the flood. Eight South Koreans were listed as out of contact through the night of Aug. 26; on the morning of Aug. 27, Foreign Minister Cho Hyun said the 10 who had been stranded were confirmed safe, while the number out of contact had risen to nine.

The workers are employed by Korea South-East Power and Doosan Enerbility and were deployed to the Rasuwa hydropower project. Nepal's government sent helicopters to reach those stranded. Seoul has set up an emergency response headquarters and dispatched an on-site team.

The cause: a collapse above the ice

Climate and glacier researchers point to a collapse in the glacial zone as the trigger. Water held on or within a glacier gives way together with ice and rock, sending a large volume downstream at once. Floods of this type cannot be predicted from rainfall alone and reach downstream settlements within tens of minutes.

The Bhotekoshi basin suffered a comparable event last year. As Himalayan glaciers retreat, the number of ponded water bodies dammed by ice increases, and with them the risk of collapse — a point on which most research agrees.

Damage across a border

The flood struck the Nepal-Xizang frontier on both sides. On the Chinese side, Jilong county in Xigaze, Xizang Autonomous Region, was hit by debris flows, and China's leadership issued instructions on search operations and relief for displaced residents.

Among the missing foreign nationals, 133 are Indians on pilgrimage to Mount Kailash in Xizang. The list also includes 47 Americans, 34 Australians, 33 Britons and 24 Canadians. Taiwan's foreign ministry said no Taiwanese casualties had been confirmed as of the morning of Aug. 27.

What is blocking the rescue

Rasuwa lies in mountainous terrain about 100km north of Kathmandu. Access roads and bridges have been severed, making overland entry effectively impossible, while monsoon-season low cloud and rain restrict helicopter operations. Communications are down across long stretches.

India said rescue personnel were on standby, and several governments are sending consular staff to Kathmandu. But with more than 400 people missing, widening the search within the first 72 hours is not straightforward, local rescue officials said.

A third perspective

Here is what this paper has confirmed as of the morning of Aug. 27. The Bhotekoshi flooded on the morning of Aug. 26; the confirmed death toll is at least around 160; more than 400 people are missing, 341 of them foreign nationals; 10 South Koreans are safe and nine are out of contact. Totals and lists are changing by the hour, and we do not present any single figure as settled.

This disaster belongs on this page for three reasons. Workers from Korean companies are missing. Villages on the Xizang side went under the same water. Pilgrims and travellers from India, the United States and Australia were in the same valley. The border that divides the northern and southern slopes of the Himalaya is politically distinct and entirely meaningless to a collapsing glacier. The list of quarrels that filled separate front pages three days ago has merged today into a single list of the missing.

One further point must be made. Floods of this kind are classified as natural disasters, but the decision to place generating plant and roads in a hazard zone, and the choice not to invest in early warning, were made by people. Whether a system for sharing upstream observations across the border in real time would have bought a few minutes is a question that will remain after the search ends.