Hydropower Chaos — Workers Vanish Underground

As flood-choked tunnels trapped scores of workers, Nepal’s army opened a blocked entrance and began clearing the way inside.

Story Snapshot

Officials concentrated rescue forces on hydropower tunnels where workers were trapped.
Rescuers reached one tunnel entrance and started removing debris, marking a breakthrough.
Authorities reported hundreds believed trapped across multiple project sites.
About 10,000 troops and experts from China and India joined the effort.

Rescue Focus: Clearing Blocked Hydropower Tunnels

Nepal’s government directed the main rescue push toward hydropower tunnels choked by flood debris. Leaders said the priority was to reach workers believed trapped inside and to reopen passageways safely. The army spokesperson described crews using controlled blasts, excavators, and search lights to cut through mud and rock. Commanders emphasized speed and safety because rising water, unstable slopes, and weak rock could shift conditions without warning. Officials said operations were active at several projects across the affected river corridors.

Troops and engineers reported a first opening at one tunnel entrance. Teams began clearing rubble to enlarge the access and move gear inside. That step created room to assess damage and plan next moves. Commanders staged heavy machinery nearby to speed the work. Rescuers set up lights and pumps to manage water and mud. Leaders warned the job would be slow and risky due to confined spaces, poor visibility, and the chance of fresh slides. Still, the cleared entrance raised hopes for wider access.

Scale of the Response and Early Rescues

The state mobilized at scale. About 10,000 Nepali troops deployed to the region, alongside specialists from China and India. Helicopters moved equipment into valleys where roads were washed out. Civil authorities coordinated with project operators and the Nepal Electricity Authority to align worker lists and site priorities. Local media and officials reported significant rescues at the Upper Trishuli system, including hundreds brought out alive, even as searches continued for many more across other tunnels.

Officials cited large numbers of workers believed trapped across multiple hydropower sites, with some reports listing totals in the high hundreds. Numbers varied by outlet and update as teams reached new areas and confirmed movements. Rescue leaders said they were reconciling rosters with contractors and site managers to tighten the count. Families gathered near project gates seeking news, while field crews relayed status through army and disaster-management channels. Authorities said they would release revised figures as checks progressed.

Why Tunnels Turn Deadly Fast in the Himalayas

Mountain tunnels concentrate risk when floods and landslides strike. Steep valleys funnel water and debris into narrow worksites. Weak rock, fault lines, and sudden inflows can collapse supports or block exits. Research on Nepal’s hydropower projects documents frequent hazards from subsurface geology and force majeure events, which can disrupt construction and threaten lives. A Reuters review of recent Himalayan disasters shows the region’s record of lethal floods and tunnel incidents, where early information often comes in waves as access improves.

Rescue crews and foreign specialists are racing to find scores of workers feared trapped alive inside hydropower tunnels in Nepal, after thick mud buried the facilities during last week’s devastating flash floods. Here’s what we know so far. https://t.co/hLq3Qu7Wid

— CNN International (@cnni) August 31, 2026

Authorities said crews were working project by project, clearing paths and testing ventilation before sending rescuers deeper underground. Commanders prioritized sites with reported worker concentrations and signs of survivable air pockets. They used pumps to lower water levels and excavators to remove silt plugs at portals. Engineers monitored slopes above portals to reduce secondary slides. The army urged patience as teams balanced speed with safety to avoid triggering new collapses while pushing toward potential survivors.