Engineers Turn WhatsApp Into a Lifeline for Nepal’s Flood‑Ravaged Tunnels

When the deluge of August 26 turned the Trishuli valley into a river of water, mud and shattered rock, the region’s hydropower plants were instantly reduced to a maze of collapsed tunnels. Within hours, rescuers found themselves hunting for the missing amid more than two million tonnes of debris.

In the chaos, a group of engineers—civil, structural, and electrical specialists—created a WhatsApp chat. What started as a quick way to share a sketch of a tunnel quickly swelled to a bustling network of over 500 members, ranging from university professors to former plant workers and even army liaison officers.

“We needed the exact layout, fast,” a senior official from the Nepal Electricity Authority typed on a Saturday, “SEND ME CHILIME LAYOUT DRAWINGS.” Within minutes, a member replied with PDFs of the powerhouse plan, tunnel cross‑sections, and access routes. Those files, once tucked away on a hard drive, suddenly became the only maps that could guide heavy excavators to the right spot.

Rescue teams on the ground have been using the diagrams to locate buried entrances that the flood had hidden beneath meters of sludge. At the Upper Trishuli 3A plant, for example, the entry was finally uncovered after six days of digging, thanks to a series of step‑by‑step instructions that were typed out in the group chat. The instructions included where to place portable oxygen lines, which sections of the tunnel were likely still intact, and even which types of soil were safe to break through.

The effort is more than just sharing PDFs. Engineers are field‑checking the data in real time. One user posted a grainy photo of a collapsed shaft and asked, “Is this the ventilation duct we marked in the 2019 design?” Another responded, “Yes— that’s the one. If you clear the left side, you’ll expose a secondary access tunnel that could lead to a chamber with trapped workers.” Such rapid, on‑the‑fly advice is saving precious minutes.

So far, the collaboration has yielded two miraculous rescues. On Friday, nine days after the flood, two men were pulled alive from the Upper Trishuli 3A tunnel. One of them, coughing and shivering, told rescuers that a handful of colleagues were still down there, awaiting help.

Authorities estimate that roughly 900 people are missing across six hydropower sites, three of which were still under construction when the water came. At Chilime, officials suspect at least eight workers could still be trapped; at Rasuwagadhi, the figure climbs to 46. The numbers are grim, but the WhatsApp network is keeping hope alive by turning technical knowledge into actionable rescue tactics.

“The flood changed the terrain entirely,” explained Nepal Army spokesperson Raja Ram Basnet. “These tunnels are no longer what they were on paper.” That’s why the constant flow of updated sketches, satellite images, and even anecdotes from former plant employees is so vital. One retired technician remembered a hidden service hatch that was never marked on official schematics; he posted a quick hand‑drawn diagram that redirected a crew to a previously unknown void.

Meanwhile, helicopters and heavy machinery continue to lift debris, and volunteers sift through mud for personal items that might hint at survivors’ locations. The combined effort—air, earth, and digital—has already restored about 10 % of Nepal’s hydroelectric capacity, which the flood had obliterated.

In a world where disasters often outpace the speed of bureaucracy, a simple messaging app has become a lifeline. The engineers’ WhatsApp group, with its blend of expertise, urgency, and humanity, shows how technology can be repurposed when lives hang in the balance.