What Nepal's Deadliest Landslide Reveals About Himalayan Risk

The numbers that don’t add up

Over 900 people are confirmed dead. Nearly 4,800 are missing. Those are staggering figures for any single event — and they come from a landslide at the Nepal-China border that struck on August 26 and is still unfolding five days later. What makes this disaster especially difficult to grasp is the sheer scale of uncertainty. The NDRRMA reports 903 dead and 4,247 missing on the Nepal side alone. On the Chinese side, in Gyirong county of Shigatse city, state media confirms 16 dead and 546 missing — including 261 foreigners from 23 countries.

The most haunting detail isn’t the total death toll, though. It’s that hundreds of people are believed trapped inside tunnels at the Trishuli-3A hydropower project. Rescue teams from Nepal, China and India have been unable to establish contact. No response. No confirmation. That gap — between what we know and what we cannot yet reach — is where this story lives right now.

A principal’s ten-minute decision

While the rescue effort grapples with access and scale, a smaller drama within the disaster offers something rarer: proof that split-second decisions save lives. Rajendra Dawadi, principal of Tribuvan Trishali Secondary School in Nuwakot district, received four separate warning calls around 9:10 AM on August 26. One caller was a parent who said: “A massive flood is coming — I’m taking my daughter.”

Dawadi didn’t wait for confirmation. He ordered students onto buses, told the drivers to turn around, and directed everyone uphill. Ten minutes later, the landslide hit. The school was buried under mud and debris. The students were safe.

“If we hadn’t decided so quickly, if we had been just ten minutes late, none of us — students and teachers included — would be speaking to you today,” Dawadi told the BBC. Ninety-nine students and staff didn’t make it out. But roughly 900 did. That is not a small thing. It is a reminder that infrastructure — whether walls, warning systems or simply the authority to act — can mean the difference between a tragedy and a catastrophe.

The foreign face of the disaster

One dimension this story carries that English-language reporting often undersells is how international this disaster is. On the Nepal side, 592 foreigners remain unaccounted for. Indian nationals number at least 320 among the missing. There are roughly 100 Chinese, 90 Americans, 41 Australians, 30 Canadians, 62 Ukrainians and 33 Britons listed as uncontacted by Nepali authorities. On the Chinese side, 261 foreigners from 23 countries are among the 546 missing in Gyirong alone.

Japan’s Chief Cabinet Secretary Hitoshi Imbara confirmed on August 27 that five Japanese nationals who appeared to be on a tour in Nepal could not be reached. Twenty-eight9 foreigners had been rescued by August 30, according to the Nepal Tourism Board — a number that sounds substantial until you set it against the nearly 600 still unaccounted for on the Nepal side.

This matters beyond the human toll. The foreign presence in these border zones is growing — not just tourists, but workers on hydropower and infrastructure projects, many of them from India and China. When disasters strike in these remote areas, the logistics of identifying, locating and repatriating nationals from dozens of countries is a diplomatic and logistical challenge that few are prepared for.

The hydropower question

Trishuli-3A is the project at the center of the unanswered questions. The Nepal government says hundreds of its workers — possibly 933 — are trapped inside the tunnels. That is a facility built into the mountainside, designed to channel water through rock. When the ground itself moves, tunnels become tombs.

This is not a new problem. Hydropower development in Nepal has accelerated dramatically over the past decade, much of it in seismically and geologically fragile zones. Projects straddle rivers that swell unpredictably and slopes that are already stressed by monsoon rains and glacial melt. The Trishuli valley itself is one of Nepal’s most developed hydro corridors.

The landslide that hit on August 26 was described as a debris flow — a mix of earth, rock and water moving with extraordinary force down a slope. That is the kind of event that infrastructure planners in the Himalayas have long warned about. Climate change is making them more frequent and more severe. Warmer air holds more moisture. Monsoon patterns are intensifying. Glacial lakes are expanding. The ground is becoming less stable.

What remains unclear — and what the rescue effort may not answer for weeks — is whether the Trishuli-3A tunnels were vulnerable by design, by location, or by a combination of both. There are no public assessments of the project’s landslide risk, nor of whether the tunnel entrances were positioned in known hazard zones. That silence is its own signal.

The border dimension

The disaster straddles an invisible line. On one side, Nepal’s Nuwakot district, grappling with a national emergency. On the other, Gyirong county in Tibet’s Shigatse prefecture, where China has been unusually transparent about its casualty figures — publishing death tolls and foreign national counts in a way that is notable for the region.

The Trishuli-3A project sits on the Nepal side, but the geology doesn’t respect the border. Landslides in this part of the Himalayas are driven by the same forces on both sides: tectonic stress, rainfall intensity, slope stability. The Chinese side’s missing count of 546 includes people who may have been working or traveling near the border crossing at Gyirong — a key node in the China-Nepal trade route.

Cross-border disaster response is theoretically straightforward. In practice, it depends on communication channels, shared data and trust. China and Nepal have cooperated on hydropower and infrastructure, but the details of how information is shared during a crisis of this scale are not publicly documented. The fact that both sides have released casualty figures, however reluctantly and belatedly, is a sign that the channels are at least partially open.

What happens next

The immediate phase — search and rescue — will continue for days, possibly weeks. The trapped workers at Trishuli-3A are the priority. If they are alive, time is the enemy. If they are not, the recovery becomes a grim exercise in identification and documentation.

Beyond that, two questions will dominate. The first is structural: will Nepal and China pause to reassess the safety of hydropower projects in the regions hit hardest by this disaster? The second is political: will the scale of foreign casualties here — Indians, Chinese, Americans, Europeans — translate into pressure for better disaster preparedness in border zones that are increasingly crowded with infrastructure and workers?

The students at Tribuvan Trishali Secondary School are alive because one man made a call and acted on it. The people trapped in those tunnels may not have had that luxury. The difference between survival and loss in disasters like this is rarely luck. It is preparation, infrastructure and the willingness to act before the evidence is complete.

Nepal’s early warning systems are inadequate, Dawadi said. He wanted sirens. He wanted alerts. What he had was a phone call from a parent who knew something was wrong and trusted her instinct enough to act. That is not a system. It is a hope — and hopes, as the 900 dead and 4,800 missing remind us, are not enough.