Nepal rescuers race to reach hundreds feared trapped in hydropower tunnels

Trapped in the Dark: Nepal’s Hydropower Workers Face a Race Against Time as Floodwaters Recede

Wanderstayfinder.com – More than 900 hydropower workers remain unaccounted for across twelve power projects in Nepal’s mountainous interior, with hundreds believed sealed inside underground tunnels and water-control chambers after a catastrophic flash flood swept through the region last Wednesday. The country’s disaster management authority confirmed the scale of the crisis as rescue crews pushed deeper into debris-choked passages, knowing that every passing hour erodes the slim window for survival.

The death toll from what officials are calling an unprecedented deluge of glacial ice, rock, mud, and debris has climbed to 939. An additional 16 fatalities were recorded on the Tibetan side of the border, bringing the combined missing count across both nations to over 4,400. The event, which struck without meaningful warning, has shattered entire communities along the Trishuli River basin and left families stranded in torrential rain with no roads, no shelters, and no clear path to recovery.

The Tunnel Problem

Approximately 500 of the missing workers were employed at projects in the Rasuwa and Nuwakot districts, areas where the flooding inflicted the most severe structural damage. Many of these men and women were inside tunnels engineered to regulate water flow through the plants. As rescue operations stretch into their second week, hydrologists and rescue specialists warn that oxygen concentrations within sealed passages are dropping, making the prospect of finding living workers increasingly remote.

Mohan Kumar Dangi, president of the Nepal Independent Power Producers’ Association, relayed testimony from workers who had managed to crawl out of the tunnels once the initial surge passed. Those survivors described colleagues still pinned beyond reach, some having shouted for help as the water rose.

“There is just mud everywhere,” said Ashish Gurung, a mountain guide who joined the rescue effort. “Inside the tunnel it was worse. It’s so difficult to move, the mud is so deep.”

Gurung’s team was attempting to reach the Chilime hydropower plant in Rasuwa, one of the hardest-hit sites. At least eight workers are believed missing there, and an Indian engineering team is operating pumps and excavators alongside the Nepali army to locate them. Gurung described the conditions inside the first tunnel section they accessed:

“Walking in it is very difficult, at one point it was up to our chests. We got close to the first station, about 130 metres in. Inside that far … it looked like it was just bodies.”

He added that the hydropower company had provided his team with a site map indicating a designated safe area within the tunnel structure. “Some of them could potentially be alive. I am hoping they are alive,” he said.

Logistics Under Siege

The geography of the disaster zone has turned every rescue operation into a logistical ordeal. More than 40 bridges have been destroyed, severing ground access to entire valleys. Helicopters carry most personnel and equipment, while India and China are shipping prefabricated truss bridges to restore critical crossings. The Trishuli River itself has become a moving hazard, shifting its course unpredictably from day to day. Terrain that was dry on Monday may be submerged by Wednesday, forcing planners to abandon fixed routes and improvise constantly.

Nepali army spokesperson Raja Ram Basnet described the engineering challenge of reopening the tunnels:

“A large amount of debris has been deposited and that is posing us a big challenge to open the tunnels.”

Over the weekend, roughly 250 workers were pulled to safety from the Upper Trishuli hydroelectric project. Army engineers subsequently began controlled blasting at that site to free another 42 workers still believed trapped beneath collapsed sections.

Mountaineers assisting the rescue have improvised with wooden planks to gauge mud depth before laying them down as makeshift walkways, tethered by rope systems to prevent slips into deeper channels. The ad-hoc nature of these methods underscores how completely conventional infrastructure has been erased.

Power, People, and a Shifting Climate

The damage to Nepal’s hydropower grid is estimated at 700 megawatts taken offline — roughly ten percent of the nation’s total generating capacity. For a country that depends heavily on domestic hydroelectric output for both household electricity and export revenue to India, the loss represents a multi-year economic wound layered atop the immediate humanitarian emergency.

Nepali Prime Minister Balendra Shah characterized the event as an “unprecedented and devastating natural disaster” and acknowledged the difficulty of compiling a complete damage assessment. In a late-Sunday social media post, he stated:

“Despite the adverse weather, difficult terrain and continuing risks, we are moving forward with determination to save the lives of our citizens.”

He confirmed that nearly 21,000 security personnel, working alongside civilian engineers and volunteers, are engaged in the ongoing operations. Whole villages have been obliterated, leaving displaced families exposed to continued heavy rainfall with no roads intact and many areas simply unreachable by any means.

Hundreds of bodies, many still unidentified, were carried down mountainsides by the torrent and subsequently interred in shallow graves following DNA screening conducted on the plains below the Himalayan range. Nepali officials stated on Monday that the singular priority now is reaching the 933 individuals still missing from hydropower facilities.

The International Red Cross has estimated that more than 93,000 people have been directly affected by the disaster. The scale of destruction — glacial outburst floods of this magnitude striking a densely populated river valley — has intensified scientific concern that accelerating climate change is destabilising the geology of high-mountain and polar regions, converting centuries of stored ice and sediment into sudden, catastrophic release events. For Nepal, whose economy, energy grid, and mountain communities are all downstream of these systems, the implications extend well beyond this single week of catastrophe.