More than 100 foreign trekkers stranded in flood-hit region of Nepal, official says

A landslide happens when soil, rock, and other loose material suddenly move downhill. If that material falls into a river valley, it can form a temporary wall across the channel. This matters because the river cannot flow normally, creating a dangerous natural dam.

Water collects behind the debris and raises pressure on the blockage. The river may eventually spill over it or force a passage through it. When the blockage fails, stored water and loose sediment can rush downstream. In Gorkha district, a pre-dawn landslide blocked the Budhi Gandaki River and caused downstream flooding.

Nepal's International Centre for Integrated Mountain Development said preliminary accounts suggested the flood may have followed the failure of a temporary blockage. The event damaged trails, bridges, homes, and three hydroelectric plants. Understanding how the blockage formed and failed could help authorities reduce risks from similar cascading hazards.

Authorities rescued 321 people on Monday after flooding struck central Nepal. The group included 12 foreigners. This shows that the emergency affected hundreds of people, while international trekkers faced particular difficulty because mountain trails and bridges had been damaged.

More than 100 foreign trekkers remained stranded in different locations. They could not return because parts of the popular trekking trail had been swept away. Bhuwan Raj Ojha of the Manaslu Conservation Area Project said trekkers who wanted to leave needed rescue, while others could continue from safe locations.

The army said rescue work would continue on Tuesday, even though the river level had receded. No flood-related deaths were reported, but five villagers were out of contact. The figures therefore describe an emergency that was partly contained, but still left many trekkers and villagers needing help or monitoring.

A landslide blockage interrupts a river's normal path. Water then accumulates upstream instead of continuing downstream. This matters because the blockage is unstable, while the growing water pressure can make the eventual release sudden and destructive.

In Gorkha district, a pre-dawn landslide blocked the Budhi Gandaki River. The International Centre for Integrated Mountain Development said the flood may have been triggered when a temporary blockage created by the landslide failed. The released water carried black muddy sludge and debris into downstream areas, damaging homes and infrastructure.

The river level had receded by Monday, but the effects continued. Trails and bridges were swept away, three hydroelectric plants were damaged, and five villagers were out of contact. The event also shows why identifying the trigger matters: better understanding of temporary river blockages could support faster warnings and stronger preparation in exposed communities.

The flood damaged the physical links that connected trekkers with the route's exits. Hiking trails and bridges were swept away, while homes and other infrastructure were damaged. This mattered because people on foot could no longer use the normal path back through the mountain area.

The damage was especially serious along the Manaslu Conservation Area's popular trekking route. Bhuwan Raj Ojha said more than 100 foreign trekkers were stranded in different places because part of the trail had disappeared. Black muddy sludge and debris also damaged three hydroelectric plants and washed away homes.

The river had receded by Monday, but receding water did not immediately rebuild trails or bridges. Trekkers who wanted to leave therefore needed rescue. Those staying or continuing could use safe locations along the route, where restaurants and tea houses were reported to be safe.

Several groups were involved in responding to the emergency. Nepalese authorities rescued people, and the army said it would continue the operation. National disaster authorities reported that homes and infrastructure were damaged and that five villagers were out of contact.

The rescue effort included 321 people, among them 12 foreigners. The army planned to continue work after the river level receded. Bhuwan Raj Ojha, an official with the Manaslu Conservation Area Project, provided information about stranded trekkers and the safety of restaurants and tea houses along the route.

The International Centre for Integrated Mountain Development, or ICIMOD, assessed preliminary accounts from Nepal's authorities. It suggested that failure of a temporary landslide-created river blockage may have triggered the flood. ICIMOD's director general said understanding the trigger would be important for reducing future risks and strengthening resilience.

Stranded trekkers had different choices depending on their condition and location. People wanting to return because of the flood needed to be rescued. Those able and willing to continue could do so from places judged safe.

Bhuwan Raj Ojha said more than 100 foreign trekkers were stranded because parts of the trail had been swept away. He also said restaurants and tea houses along the route were safe. These facilities gave trekkers places to wait while rescue and route decisions continued.

The best option depended on access and safety, not simply on the river level. Although the water had receded, damaged trails and bridges still blocked normal travel. The army said rescue operations would continue on Tuesday, giving people who could not safely leave on foot a route toward assistance.

Himalayan communities and river corridors are especially exposed because settlements, trails, bridges, and infrastructure often lie close to steep mountain slopes and powerful rivers. A single event can therefore affect many connected places. This matters because hazards may arrive in sequence rather than separately.

In Nepal, a landslide blocked the Budhi Gandaki River, and the resulting flood swept away trails and bridges. The river is also a tributary of the Trishuli River. Farther downstream, another tributary experienced a catastrophic flood after a glacier collapse in August, killing 1,457 people, with thousands still missing.

ICIMOD called the latest flood a reminder of the exposure of mountain communities and river corridors to sudden, cascading hazards. Immediate response remains important, but understanding the trigger is also necessary. That knowledge can help reduce future risks and strengthen resilience, although the article does not specify particular future projects.