KATHMANDU — Nepali army rescue teams deployed heavy drilling equipment on Saturday in an effort to reach more than 100 people trapped inside a hydropower tunnel, three days after flash floods inundated the construction site and cut off all escape routes.
The operation, now in its fourth day, represents one of Nepal’s most complex rescue efforts in recent memory, with military engineers working around the clock to breach debris blocking access to the underground passage. The trapped workers, believed to be construction laborers employed at the hydroelectric project, remain inside the tunnel with their condition and precise circumstances still undisclosed by authorities.
The incident has cast a sharp spotlight on worker safety protocols and disaster preparedness at large-scale infrastructure projects across Nepal, a Himalayan nation increasingly exposed to climate-driven extreme weather events. As of Saturday, the Nepal Army had not released official information regarding casualties, successful contact with those trapped inside, or the specific cause of the flooding that sealed the tunnel entrance.
Rescue teams have deployed industrial drilling machinery to cut through accumulated debris, with military sources indicating the operation could extend for several more days depending on the volume of material blocking the tunnel. The site, located in a mountainous region characteristic of Nepal’s challenging terrain, has presented responders with significant logistical obstacles, including difficult access roads and the continued risk of additional flooding.
The flooding has raised urgent questions about the adequacy of safety measures at hydropower construction sites, where thousands of workers labor in tunnels, along riverbeds, and in valleys that can transform into death traps when monsoon rains trigger upstream landslides or glacial lake outburst floods.
The incident highlights the mounting risks faced by laborers on hydropower projects in Nepal, where rapid expansion of renewable energy infrastructure has proceeded alongside increasingly erratic monsoon patterns. Hydropower constitutes a cornerstone of Nepal’s national energy strategy, with dozens of large projects either under construction or in planning stages, aimed at meeting domestic electricity demand while increasing exports to neighboring India.
Nepal possesses what engineers estimate to be approximately 83,000 megawatts of economically feasible hydropower potential, representing one of the highest per-capita hydroelectric resources in the world. Capitalizing on this resource has become a central economic and political priority, driving massive investment from both state-owned entities and private developers, including foreign companies specializing in tunnel construction.
The trapped workers represent a significant portion of the project’s active labor force, underscoring the concentration of risk that emerges when construction continues through high-risk weather windows. Questions have begun emerging about whether evacuation protocols were in place, whether workers received timely warnings as floodwaters rose, and whether site managers had access to functioning early warning systems.
Regional meteorological agencies have forecast above-normal monsoon precipitation for the coming weeks, raising concerns that additional heavy rainfall could complicate rescue operations or trigger further flooding at the site. Nepal’s monsoon season, which typically runs from June through September, delivers the vast majority of the country’s annual rainfall and consistently triggers landslides and flash floods across its mountainous terrain.
The disaster arrives against the backdrop of Nepal’s deadliest flood-related catastrophe in recent years. In 2024, concentrated landslides and flash floods killed more than 200 people during an unusually intense period of heavy rainfall, exposing the vulnerability of communities, infrastructure, and construction sites across the Himalayan nation.
Nepal’s army, which frequently leads disaster response operations in the country due to its superior equipment and organizational capacity compared to civilian emergency services, has assumed primary command of the rescue effort. Military spokespersons have provided limited updates, citing the ongoing nature of operations and the need to avoid information that could complicate coordination efforts.
Analysis: The tunnel collapse exposes the intersection of Nepal’s ambitious infrastructure development goals and the growing reality of climate-exacerbated weather extremes. As Kathmandu accelerates hydropower construction to harness its substantial hydroelectric potential, the incident is likely to intensify scrutiny of safety standards, early warning infrastructure, and evacuation procedures at tunnel and dam sites throughout the country.
Critics have long argued that the pace of hydropower development has outrun regulatory oversight, with inspection regimes struggling to keep pace with the number of active projects. The absence of transparent reporting on worker conditions, safety audits, and emergency preparedness at individual sites has made it difficult for independent observers to assess risk levels at specific projects.
The disaster also raises broader questions about the treatment of construction workers, many of whom travel from other regions of Nepal or from neighboring countries to work on infrastructure projects in remote mountain areas. Labor rights advocates have frequently highlighted inadequate safety equipment, insufficient training, and limited access to emergency medical care at construction sites across the country.
International construction companies involved in Nepal’s hydropower sector face particular scrutiny over whether they apply the same safety standards required in their home countries when operating in nations with less robust regulatory enforcement. Several major foreign firms have secured contracts for Nepal’s largest hydroelectric projects, which often involve the most technically challenging tunnel excavations and dam construction.
The incident comes as Nepal continues to rely heavily on external development financing for its infrastructure expansion, with international financial institutions and foreign governments providing significant capital for projects designed to increase electricity generation and transmission capacity. These lending arrangements typically include environmental and social safeguards, though the effectiveness of monitoring and enforcement has been questioned by oversight organizations.
The coming days will likely bring increased pressure on Nepal’s government to provide more detailed information about the trapped workers, the cause of the flooding, and the steps being taken to prevent similar incidents at other hydropower sites currently under construction. Parliamentary oversight committees and civil society organizations have indicated they will seek formal accountability reviews once the immediate rescue operation concludes.
Rescue teams face a race against time as monsoon weather systems approach the region, with meteorologists warning that additional heavy rainfall within the next week could elevate water levels in rivers and tributaries feeding the affected tunnel system. Military engineers have been working to divert surface water flow away from the tunnel entrance while simultaneously drilling through debris blocking access.
International rescue specialists have not been publicly requested as of Saturday, though protocols exist for requesting assistance from neighboring countries or United Nations disaster response mechanisms if the operation extends significantly beyond current capabilities.
The broader hydropower sector has experienced a series of safety incidents in recent years, though none of comparable scale to the current tunnel emergency. Industry observers note that the technical challenges of constructing hydroelectric facilities in Nepal’s steep, seismically active terrain require specialized engineering approaches that carry inherent risks when extreme weather events overwhelm design assumptions.
As rescue operations continue, the families of trapped workers have gathered near the site, expressing frustration over the limited information released by authorities. Community leaders have called for greater transparency and for government officials to establish direct communication channels with affected families.
The outcome of the rescue operation will likely shape Nepal’s approach to infrastructure safety regulation for years to come, with advocacy groups preparing to push for mandatory emergency preparedness requirements, independent safety inspections, and clearer accountability frameworks for project operators and investors.
Sources
France24 News
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Story synopsis gathered from: France24 News — source
