---
title: "Nepal Flood 2026, what Rasuwa lost and how the helicopter rescue is being run"
description: "A flood with no rain behind it took the only road into Rasuwa on 26 August. What it destroyed in one morning, and how the district was reached after."
source: "https://gohelinepal.com/blogs/nepal-flood-2026-rasuwa-helicopter-rescue"
markdown: "https://gohelinepal.com/md/blogs/nepal-flood-2026-rasuwa-helicopter-rescue"
site: "Go Heli Nepal"
updated: "2026-08-31"
author: "Go Heli Nepal"
---

# Nepal Flood 2026, what Rasuwa lost and how the helicopter rescue is being run

_Safety · 9 min read · published 2026-08-31, reviewed 2026-08-31_

A flood with no rain behind it took the only road into Rasuwa on 26 August. What it destroyed in one morning, and how the district was reached after.

On Wednesday 26 August 2026 a wall of water crossed from Tibet into Nepal and came down the Bhote Koshi. It reached the village of Timure shortly after nine in the morning and carried on through Syabrubesi, Mailung and Betrawati.

Within hours the only road into upper Rasuwa had gone and the district could be reached only by air.

This is what happened, when it happened, and what the flying involved. We work in these valleys, so the aviation side of the story is the part we can explain properly.

## The morning the Bhote Koshi came down, hour by hour

The break and the burst took minutes. The water was through the last village on the list by early afternoon.

**How the Rasuwa flood unfolded**

| When | What happened |
| --- | --- |
| 26 Aug, around 8.40am | Ice and rock are thought to break away at about 5,200 metres above the border and fall into the Lhende Khola |
| 26 Aug, morning | Debris dams the river roughly 20 kilometres above the Miteri Bridge, then the dam bursts |
| 26 Aug, about 9am | The surge reaches Timure and destroys the helipad there |
| 26 Aug, early afternoon | Syabrubesi, Mailung and Betrawati are hit. Two Army helicopters are sent, then more |
| 26 Aug, evening | Twelve helicopters are committed, four Army and eight private |
| 26 Aug, afternoon | An Army Mi-17 flies an emergency medical team to District Hospital Trishuli |
| 28 Aug | The barrier lake overflows. Rescue flying stops for about 90 minutes, then resumes |
| 29 Aug | Survivors are airlifted to the Army camp in Nuwakot |
| 30 Aug | The Army reports 2,697 rescued from Rasuwa. Four air holes are drilled into the Upper Trishuli 3A tunnel |

_Compiled from Nepali and international reporting between 26 and 31 August 2026. Times are local._

## What caused the Nepal flood in 2026?

The first reports called this a glacial lake outburst flood, which people who work in the mountains shorten to GLOF. It is worth knowing what that means, because this was close to one without quite being one.

The idea is simple. A melting glacier leaves behind a wall of loose rock and gravel. Water collects behind that wall. Nobody built it and nobody maintains it. One day it fails and the water leaves all at once.

In Rasuwa the wall was not an old one sitting there for decades. It was made on the day, out of the ice and rock that fell into the Lhende Khola. The river was blocked and unblocked inside a morning, which is why there was no warning to give.

Scientists looked at a glacial lake first and moved away from it. What they describe instead is an ice and rock avalanche off Langtang Lirung that made its own dam and broke it the same morning.

Researchers at ICIMOD and partner institutions in Nepal and China were still investigating the exact trigger at the end of August. An ice and rock avalanche is the leading explanation rather than a settled finding.

## It never rained, so why did the river rise?

Nepal floods every monsoon, so most people assumed the rain did this. It did not.

There had been no rain in the area for the previous 24 hours. Nothing downstream looked like flood weather, and that is why so many people were caught in the open along the riverbank.

Seismometers did record it. A seismic signal the size of a magnitude 5.2 earthquake was recorded. It was not an earthquake. Read against the timing, it was almost certainly the landslide itself striking the valley. The ground shook because of the flood rather than the other way round.

## What the flood took, in one morning

The Betrawati to Rasuwagadhi section of the Pasang Lhamu Highway is the only road into upper Rasuwa. The Department of Roads recorded all 42 kilometres of it destroyed at multiple points, along with 32 bridges across three districts.

In Nepal the road and the river share the valley floor, because there is nowhere else flat enough to build. When a flood scours the riverbed it takes the road with it, and there is no second route to fall back on.

**What was lost**

| What | Detail |
| --- | --- |
| Bridges | 32 across Rasuwa, Nuwakot and Dhading, including the Miteri Bridge |
| Road | All 42 kilometres of the Betrawati to Rasuwagadhi section of the Pasang Lhamu Highway |
| Helipad | Timure, swept away completely |
| Border post | The Rasuwagadhi customs building |
| Power | The 220 kV Trishuli 3B Hub substation |
| Vehicles | More than 300 vehicles from the customs yard, and over 400 container trucks unaccounted for |
| Hydropower | Projects along the Trishuli, including tunnels where workers were trapped |
| Economy | A preliminary government estimate of around 200 billion Nepali rupees |

_Reported by Nepali outlets between 26 and 30 August 2026. Assessments were still being updated._

## What was lost, and what it costs

The Ministry of Physical Infrastructure put infrastructure damage at around 200 billion rupees on the first day, and that figure will move, because nobody costs a rebuilt gorge road in a week and hydropower losses are counted separately.

Hydropower took the worst of it. Projects along the Trishuli were hit directly, tunnels flooded with shifts underground, and the 220 kV Trishuli 3B Hub substation was destroyed. Twelve plants totalling 431 MW came off the national grid, which is close to a tenth of Nepal's capacity. Nepal sells power to India in the wet season and buys it back in the dry one, so generation lost in Rasuwa turns up on the national books within months.

Then there is the season. Autumn is when Langtang and the Tamang Heritage trail earn their year, and the road that carries those trekkers in is the road that has gone. That cost lands on lodge owners and guides rather than on any ministry, and it will not appear in any damage assessment.

## What happened on the Tibetan side?

The ice and rock fell in the high country above the frontier, and Tibet was hit as well.

Sixteen deaths were reported on the Chinese side and 546 people listed as missing, among them 261 foreigners from 23 countries. Gyirong county, which Nepalis call Kerung, took damage along the same river.

The Miteri Bridge went with the water. People also know it as the Nepal China friendship bridge, and it carried the main trade route between the two countries. With the bridge gone and the customs building destroyed, Rasuwagadhi stopped functioning as a border crossing.

Chinese authorities ordered evacuations at Jilong port because of the new lake sitting above it, and later suspended their own rescue work when it began to overflow. Both governments spent the following week watching the same body of water from opposite sides.

## How many people died in the Nepal flood?

Sources disagreed and the figures moved daily, which is normal in the first week. This is where they stood on 31 August 2026.

On the morning of 31 August Nepal's disaster authority put the confirmed dead at 903, with 1,473 injured. Tibet reported 16 more. In Nepal 4,247 people were listed as missing or out of contact, among them 592 foreign nationals and around 900 hydropower workers. Tibet listed a further 546 missing, including 261 foreigners from 23 countries.

The missing figure nearly doubled between 30 and 31 August, from 2,502 to 4,247, as hydropower employers filed worker manifests. More than 10,000 people had been rescued by then.

The great majority of those brought out were Nepali. Among the foreign nationals were 121 Indians, 72 Chinese, 15 South Koreans, four Germans, two Americans, two Italians and one Omani.

Some 20,819 security personnel were mobilised across fourteen task forces, up from 13,295 three days earlier. Every figure here comes from Nepali and international reporting in the first week, and every one of them was still moving. Treat them as a snapshot of 30 August rather than a final count.

## What the helicopters actually did?

With the road gone there was one way in and one way out. Twelve helicopters flew on the first day, four Army and eight private, and the fleet had grown to fifteen by the Army's count of 30 August, seven of them military. Kailash Helicopter Services, Simrik Air and Annapurna Helicopters were among the civilian names reported.

By the morning of Sunday 30 August the Army had rescued 2,697 people from Rasuwa. Of those, 2,497 came out by air from four points, Timure, Syabrubesi, Dhunche and Mailung. On Friday 28 August the Army had airlifted 449 people out of the district by lunchtime alone.

On the day of the flood an Army Mi-17 carried an emergency medical rescue team in to District Hospital Trishuli, which had gone from a quiet district facility to the receiving hospital for a national disaster overnight.

Helicopters also carried machinery. The Army drove excavators and bulldozers as far as Battar in Nuwakot, cut them down into liftable sections there, and flew them the rest of the way to the hydropower site. Diggers were needed to move debris and search collapsed buildings, and with the road gone there was no way to drive one in. Slinging plant into a valley is ordinary mountain work here, and it is why a helicopter in a disaster is more than an ambulance.

## The hardest rescue of all was underground

Water entered the tunnels at the Upper Trishuli hydropower project while shifts were underground.

Rescue teams drilled four openings into the Upper Trishuli 3A tunnel so they could pump air inside, and the government asked India and China to send tunnel rescue specialists. China sent nine tunnel rescue experts, and Arnold Dix, the Australian engineer who ran the Silkyara tunnel rescue in India in 2023, is advising.

Upper Trishuli 3A is not the worst of it. Upper Trishuli 1 has 576 people missing, around 300 of them believed to be inside its tunnels. Across twelve damaged projects roughly 500 of the missing are thought to be underground, and 289 people had been brought out of tunnels by 31 August.

Heavy rain from about two in the morning on 31 August flooded the excavation at the Trishuli 3A tunnel mouth and stopped the work again.

Helicopters kept that operation supplied and moved its casualties, but the work itself was drilling and pumping, done by hand at the tunnel mouth.

## The ninety minutes when every helicopter stopped

Debris from the flood dammed the river a second time and formed what is called a barrier lake.

On Friday 28 August the lake began to overflow. Officials in Rasuwa were told the lake had broken its banks and that a fresh flood or landslide could follow. The places teams most needed to search became the most dangerous places to stand.

Nepal stopped its search flying for about 90 minutes, and Chinese teams pulled back to high ground for a period nobody has published. Local people were seen running uphill. Flying resumed the same day once the risk was judged manageable.

Heavy rain later halted work along the Trishuli again as the river rose and residents were moved out. This is the part outsiders find hardest to picture. The weather and the water decide when anyone flies, not the schedule.

## Can you fly into Langtang right now?

There is no single answer that stays true for a week.

Four things decide access to any one destination. The weather that morning, the condition of the landing site, whether an aircraft is free, and whether permissions are in place. The Timure helipad no longer exists, and at least one rescue helicopter had to turn back because there was nowhere safe to land.

A Civil Aviation Authority of Nepal circular has required two pilots on monsoon helicopter flights since 15 June 2026, with medical evacuations carrying a stretcher patient exempt, so operators had fewer crews available than aircraft.

The practical advice is short. Ask about the specific landing site rather than the region, expect to confirm on the morning, and build a spare day into the plan.

## Is the road to Syabrubesi open? Is the border?

No, and not for a while.

The Pasang Lhamu Highway is the only road from Kathmandu to Syabrubesi and 42 kilometres of it is destroyed. Beyond Syabrubesi, towards Timure and the frontier, the road and its bridges are destroyed outright.

Nobody has published a credible reopening date. Rebuilding a road through a gorge the river has just stripped takes seasons rather than weeks, and anybody offering you a date is guessing.

Rasuwagadhi lost both its customs building and the Miteri Bridge, which is the crossing itself. Whether it reopens is a decision for the Nepali and Chinese governments, and on the Chinese side Jilong was under evacuation orders because of the barrier lake. If you are travelling for Kailash through Kerung, your own operator is the only source worth relying on.

## Is it safe to travel to Nepal after the flood?

Check the valley, not the country. Nepal has many river systems and this flood hit one of them. Everest, Annapurna and Mustang were not touched.

The Kathmandu valley did not flood, but do not read that as no disruption. The Prithvi Highway west of the capital was blocked for several days and sank at Krishnabhir in Dhading on 30 August, cutting the Mugling to Kathmandu section. Vegetable arrivals at Kalimati market fell by nearly half in a day.

If Langtang is your trip, the news is better than it sounds. The flood came down a different drainage from the one the Langtang trail follows, so the walking above Syabrubesi is likely to be intact. No survey of the full route has been published though, and the Nepal Tourism Board has asked travellers to postpone trips into the Rasuwa corridor for now.

So the walking is still there. Only the way in has gone, and while the road is out there is no ordinary way to reach the valley. Travellers with Langtang or Tamang Heritage bookings should speak to their trekking agency before heading towards Rasuwa, because the agency holds the permits and can move the dates.

Separately, we have written on [how a mountain rescue actually gets started](https://gohelinepal.com/blogs/how-nepal-helicopter-rescue-works). [What a travel policy has to cover before it will pay for one](https://gohelinepal.com/blogs/travel-insurance-helicopter-evacuation-nepal) is rarely what people assume.

**Which trekking regions the flood actually reached**

| Region | Where it stands |
| --- | --- |
| Langtang valley | A separate drainage from the flood. No survey published. Road cut. Ask your agency |
| Gosaikunda | Same road and the same problem. Ask before you commit |
| Tamang Heritage trail | Reached through Syabrubesi, so access is affected |
| Manaslu | A different river, but reached via the Prithvi Highway, which was cut. Ask your operator |
| Everest and the Khumbu | A different river system entirely. Unaffected |
| Annapurna | A different river system entirely. Unaffected |
| Mustang and Pokhara | Trails and towns fine. Prithvi Highway access was disrupted |
| Kathmandu valley | No flooding. The Prithvi Highway west of the city was cut |

_Position as at 31 August 2026. Road and trail status in Rasuwa was changing week to week, so confirm with your trekking agency rather than with this table._

## Will a flood like this happen again?

There is more meltwater in the Himalaya than there used to be, and more lakes held back by loose rock. More lakes means more that can fail. That much is measured and nobody argues with it.

Tying any single flood to that trend takes months of work, so nobody can tell you this one was caused by a warming Himalaya. What can be said is that the conditions for it are more common than they were, and that warning systems on these rivers are the part still missing.

## Questions

### What caused the Nepal China flood in 2026?

The most likely cause, still under investigation at the end of August, is a mass of ice and rock that broke away at about 5,200 metres above the border and fell around 1,200 metres into the Lhende Khola. The debris dammed the river roughly 20 kilometres above the Miteri Bridge. Water built up behind it and the blockage gave way, sending everything down the Bhote Koshi and into the Trishuli at once.

### How many helicopters were used in the Nepal flood rescue?

Twelve helicopters flew on the first day and fifteen were working the district by 30 August, seven of them belonging to the Nepali Army and eight to private operators. An Army Mi-17 carried an emergency medical team to Trishuli district hospital, and helicopters flew excavators and bulldozers, cut into liftable sections at Battar in Nuwakot, on to the hydropower site.

### How many people were rescued by helicopter in Rasuwa?

The Nepali Army reported rescuing 2,697 people from Rasuwa by the morning of Sunday 30 August 2026, of whom 2,497 were lifted out by air from Timure, Syabrubesi, Dhunche and Mailung. On Friday 28 August alone the Army had airlifted 449 people out by lunchtime.

### How many people died in the Nepal China flood?

On the morning of 31 August 2026 Nepal put the confirmed dead at 903 with 1,473 injured, and Tibet reported 16 more. Nepal listed 4,247 people as missing or out of contact, a figure that nearly doubled overnight as hydropower employers filed worker manifests. These numbers were still moving, so check a current news source.

### Why were helicopter rescue flights stopped in Rasuwa?

On Friday 28 August 2026 the barrier lake formed by flood debris on the border broke its banks. Nepal halted its rescue flying for about 90 minutes while the risk was assessed, and local people were seen running uphill. Operations resumed the same day once officials judged the risk manageable.

### Are helicopter flights to Langtang and Rasuwa running now?

There is no blanket answer. Access has to be assessed for each destination against weather, landing site condition, aircraft availability and permissions. The Timure helipad was swept away entirely, and at least one rescue helicopter had to turn back because there was nowhere safe to put down.

### What happened to the workers trapped in the Upper Trishuli tunnel?

Hundreds of hydropower workers were caught when water entered tunnels at the Upper Trishuli project. Rescue teams drilled four openings into the Upper Trishuli 3A tunnel to pump air inside, and tunnel rescue specialists came from India and China. Around 900 workers were missing across twelve damaged projects, roughly 500 of them believed to be inside tunnels. Upper Trishuli 1 alone accounted for 576.

### Is it safe to travel to Nepal after the 2026 flood?

Most of the country was untouched. The flood hit one river system, so Everest, Annapurna, Mustang and the Kathmandu valley carried on as normal. Rasuwa is the district to ask about, and travellers with Langtang or Tamang Heritage bookings should speak to their trekking agency before setting off.