How engineers in a WhatsApp group are guiding Nepal's tunnel rescue efforts

How engineers in a WhatsApp group are guiding Nepal's tunnel rescue efforts.

Key points

• Family members await news of missing loved ones, like Rajesh Shrestha, whose 30-year-old son, Rajish, is an environmental engineer at Upper Trishuli 1.
• More than 1, 200 individuals were killed in last week's deluge caused by a glacier collapse.
• The messaging group was set up by engineers before the wall of water, mud and rock crashed down the Trishuli valley in Nepal on August 26.
• At Rasuwagadhi hydropower plant, rescue workers reached 250 metres into one tunnel before finding it blocked.
• At the Upper Trishuli 3A hydropower project, rescue workers took almost six days before reaching the tunnel since the entrance was buried, Shahi stated.

How engineers in a WhatsApp group are guiding Nepal's tunnel rescue efforts. Reuters Published September 4, 2026 Updated September 4, 2026 12: 18pm. Join our Whatsapp Channel. Add Dawn as a trusted source.

In practice, an army of experts in a WhatsApp group is guiding rescue workers scouring a Nepali valley after a massive flash flood more than a week ago as they desperately search for anyone who may be alive inside tunnels of devastated hydropower plants.

For context, the messaging group was set up by engineers before the wall of water, mud and rock crashed down the Trishuli valley in Nepal on August 26. It has since become a valuable tool alongside helicopters and heavy machinery in the race to find survivors.

For context, the authorities hope some of the regarding 900 residents documented missing from six hydropower plants – at least three of which were under construction – may have escaped the deluge as they worked in or fled into the tunnels.

In a first sign of success, two individuals were brought out alive from a tunnel linked to the Upper Trishuli 3A hydropower plant on Friday, nine days after the disaster. One of them remarked there could be more survivors in the tunnels.

Even finding entrances to some of the tunnels. It were designed to channel water or applied to access hydropower facilities, is tough now after the flood deposited 2.2 million tonnes of mud and debris down the valley. 'Send me layout drawings'.

"Can you send me Chilime layout drawings, " a administration official wrote on the engineers' WhatsApp group on Saturday as rescue workers searched the buried remains of the Chilime hydropower plant high in the Himalayan valley close to the Chinese border.

Minutes afterwards, a member of the group chat. It was expanded to add more experts in backing of the rescue effort, responded by sending drawings of the project's powerhouse, as well as details of access tunnels.

That exchange and others posted on the group. It has more than 500 members, were seen by Reuters.

While an official at the Nepal Electricity Authority noted 46 may be trapped at Rasuwagadhi hydropower plant, further south, nepal's Independent Power Producers' Association remarked on Monday at least eight residents could be trapped at Chilime.

Reuters spoke to a dozen individuals – including administration and military authorities, engineers, survivors and relatives of missing workers – who described the efforts to search the tunnel networks of ruined hydropower plants, including how real-time guidance was being provided by experts over WhatsApp.

"The flood has altered the terrain around the tunnels and changed their structure, while mud, rocks, soil and other debris had accumulated inside, " Nepal army spokesperson Raja Ram Basnet informed Reuters. "This is not a normal closure of tunnels."

At Chilime, Reuters images on Monday indicated a substantial tunnel entrance with flood debris rising to the ceiling a short way inside.

More than 1, 200 individuals were killed in last week's deluge caused by a glacier collapse. More than 4, 000 individuals are still missing, including those who might be trapped inside tunnels.

Alongside Chilime, rescue workers are searching five other hydroelectric sites in the valley that were part of an expanding network of plants powering the nation and exporting the surplus. The flood wiped out 10 per cent of Nepal's generation capacity. Seeking advice regarding tunnel networks via WhatsApp.

At Rasuwagadhi hydropower plant, rescue workers reached 250 metres into one tunnel before finding it blocked. But they have not given up the search.

"We are trying to reach there inside again to look for people, " remarked Amshu Kiran Shahi, a board member of the Nepal Electricity Authority, adding that 46 residents may have been trapped in a chamber, where they might have access to food and water.

Notably, a manager at the Nepal Electricity Authority, speaking on condition of anonymity, remarked rescue workers had additionally asked former plant employees for advice regarding the tunnel networks via the WhatsApp group. He remarked drawings posted on the group had been useful.

At the Upper Trishuli 3A hydropower project, rescue workers took almost six days before reaching the tunnel since the entrance was buried, Shahi stated. Before the survivors were pulled out on Friday, rescue workers had been trying to supply oxygen via pipes into any cavities in case someone was trapped.

For context, a Reuters photographer who flew to the site on Thursday saw excavators trying to move massive boulders from the mouth of a tunnel and seeking to work their way deeper inside.

Jan Jiwan Thakur, a civil engineer at the Upper Trishuli 1 plant, remarked a colleague cautioned him of the coming flood moments before it swept down the valley, giving him enough time to climb to higher ground with regarding 100 others from the facility.

"We just ran away towards the hillside and, after two to three minutes when we looked down, everything was gone, " he remarked. "The flood debris had entirely covered our office area."

Dhan Bahadur Tamang described escaping through a tunnel when the flood hit, sending pipes and other equipment rushing inside. With knowledge of the tunnel system, he and a number of others identified a way out but he described seeing bodies during his subterranean journey to escape.

On the engineers' WhatsApp group, members shared names and mobile phone numbers of missing workers, asking administration office-holders to relay them to telecom authorities in a bid to find their last recorded location.

Meanwhile, family members await news of missing loved ones, like Rajesh Shrestha, whose 30-year-old son, Rajish, is an environmental engineer at Upper Trishuli 1.

"Whenever I look outside, I imagine seeing him carrying a bag and coming home, just as he used to, " remarked Shrestha, who runs a workshop making window grills. "I am surviving on the hope that he will return."

In short, how engineers in a WhatsApp group are guiding Nepal' s tunnel rescue efforts is the central thread here, and readers can expect follow-up reporting as the picture becomes clearer.