Flash Flood Devastates Nepal‑China Border: Satellite and CCTV Reveal Chaos

Sun Sep 06 2026 00:34:27 GMT+0000 (Coordinated Universal Time)

A sudden flash flood torn through the remote Gyirong‑Rasuwagadhi crossing, wiping out buildings, a bridge and leaving hundreds missing.

In late August, a catastrophic flash flood slammed the Nepal‑China border at Gyirong, sending a wall of water, mud and rock down the valley. CCTV footage captures people fleeing as the torrent overtakes the crossing, while satellite imagery shows the devastation before and after the disaster. Authorities report that over 300 Indians, hundreds of Nepalis and other foreigners were at the border when the flood struck; nearly 275 Indian nationals remain missing. Rescue teams have arrived, but the truce‑driven route that connects Kathmandu to Tibet remains closed as the region recovers.

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A dark wall appears from behind the buildings at Gyirong, on the Chinese side of the Nepal-Tibet border. At first it looks almost like a black cloud, but then it gathers shape and speed as water, mud, boulders, ice and rock surge down the valley at 10:59:53 local time.

Fragments of video and satellite imagery before and after the disaster start to reveal the scale of the destruction. Much of the border complex was swept away, and buildings that once crowded the valley floor simply vanished.

Gyirong was one of the places devastated by the floods that tore through the region on 26 August. Just across the frontier, at Rasuwagadhi in Nepal's Rasuwa district, the destruction was also extensive – the Friendship Bridge linking Nepal and China was swept away along with customs facilities, and the small trading settlement of Timure was destroyed.

Local authorities say more than 300 people may have been at the crossing on the morning of the flood, with 275 Indian nationals still missing. Immigration officials at Rasuwagadhi recorded its final transaction at 8:35:03 am local time, less than 10 minutes before the torrent appeared on the CCTV footage.

Four immigration employees, including the head of the Rasuwagadhi office, went missing in the floods; one employee was later found far downstream. The female official who recorded the final transactions is still missing.

Electronic records show that 89 Nepali and foreign nationals had cleared immigration to leave Nepal for Tibet, while four people had registered their entry into Nepal. Among the foreign nationals recorded leaving that morning were 32 Indians, 12 Chinese nationals and nine Americans, plus citizens of Britain, Canada, Australia and Italy.

Seismic instruments detected a movement in the mountains above the border at 8:37 am – only two minutes after the immigration system recorded its final transaction. Researchers later attributed the signal to the collapse of part of a glacier that triggered the flood. Chinese officials said the mudslide reached the border crossing in about seven minutes.

Rescue teams from China arrived on 28 August and reported that nothing but ruins remained visible. The crossing had recently recovered from another major flood that shut it for nearly six months in July 2025, when it reopened on 1 January after a temporary bridge was built.

More than 100,000 people have passed through Gyirong each year; in the year to mid‑July, Nepali immigration recorded 53,742 arrivals and departures at Rasuwagadhi. The route also handles about 80 % of Nepal’s electric‑vehicle imports from China, and around 60 to 70 trucks pass daily carrying electronics, machinery, fruit, clothing and other goods.

With the closure of this key artery, Nepal has shifted reliance to Tatopani, which has also been temporarily closed due to landslide risks. The cross‑border traders and pilgrims from Thailand, India and other countries now face a longer, more difficult journey.

Locals remember the danger: The previous year’s flood had made staff at the immigration office acutely aware of the risk, and those at the border sometimes felt vibrations and went outside to check the river. Despite precautions, they could not escape when the tragedy struck.