Indian rescuers fly to Himalayan region where flood washed out bridges and killed at least 74

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GANGTOK, India (AP) — Air force helicopters rescued scores of stranded tourists Monday in India’s Himalayan northeast after a 6-year-old hydroelectric dam cracked open last week in intense rain, flooding a valley with glacial lake water and killing at least 74 people.

Officials told the Press Trust of India news agency that they recovered 34 bodies in Sikkim state since the flooding began on Wednesday, while authorities in neighboring West Bengal state have retrieved 40 bodies from the Teesta River as the floodwaters carried them downstream.

READ MORE: Death toll of icy flood that inundated India’s Himalayan northeast rises to 47

Around 100 people are still missing, police said. As weather conditions improved in Sikkim state, helicopters arrived in the worst-hit Mangan district to help some 3,000 stranded tourists.

The design and placement of the Teesta 3 dam, the biggest hydroelectric dam in Sikkim, were controversial from the time it was built. A 2019 report identified Lhonak Lake as “highly vulnerable” to flooding that could breach dams and cause extensive damage.

It wasn’t clear what triggered the deadly flood that began early Wednesday, the latest to hit northeast India in a year of unusually heavy monsoon rains. Experts say possible contributors were the intense rain and a 6.2 magnitude earthquake that struck neighboring Nepal on Tuesday afternoon.

The flood began when the glacial lake overflowed, cracking open the Teesta 3 dam. The icy waters then cascaded through towns in the valley below, carrying some bodies kilometers (miles) downstream.

On Monday, as the skies cleared and rains subsided, 77 tourists stranded by washed-out roads were airlifted out of northern Sikkim, police told PTI news agency.

On Sunday, helicopters rescued 89 others who were stranded in the area. Some 10 tourists, including five Thai nationals, were able to trek to safety with assistance from rescuers. Overall, more than 5,000 people have been brought to safety since the disaster struck last week, PTI reported.

The flood destroyed multiple bridges, hit pipelines and damaged hundreds of houses in northern Sikkim. Of 23 Indian soldiers reported missing earlier, officials say one was rescued and 10 were confirmed to have died, while the search for the others continued.

There is no land access or mobile connectivity in the area, complicating rescue efforts and sharing of information. Thousands of people are sheltering in relief camps set up by the state.

Experts say the flooding disaster underscores a climate dilemma that pits local environmental activists who believe dams in the Himalayas are too dangerous against Indian authorities pursuing green energy agenda.

Despite risks to dams due to the increasing frequency of extreme weather, the Indian federal government aims to increase India’s hydroelectric dam output by half, to 70,000 megawatts, by 2030.

Several towns, including Dikchu and Rangpo in the Teesta basin, were flooded.

Rangpo resident Muhammad Karim has been searching for his father, brother and sister-in-law for five days. “I am clueless. … I have asked the police for help, but there’s been no progress so far,” he said.

Homes and buildings in the town were covered by mud as excavators dug through debris to recover bodies over the weekend.

Disasters caused by landslides and floods are common in India’s Himalayan region during the June-September monsoon season. Scientists say they are becoming more frequent as global warming contributes to the melting of glaciers there.

Himalayan glaciers could lose 80% of their volume if global warming isn’t controlled, according to a report from the International Center for Integrated Mountain Development.

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