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Uttarakhand glacier disaster: Race to rescue 200 people missing in India

image copyrightReuters

image captionRescue workers are trying to clear a blocked tunnel in Uttarakhand

Emergency workers are searching for as many as 200 people still missing after a piece of a Himalayan glacier fell into a river and triggered a huge flood in northern India, killing 18.

The floodwaters burst open a dam and a deluge of water poured through a valley in the state of Uttarakhand on Sunday.

Most of the missing are believed to be workers from two hydropower plants.

The rescue effort is focused on several sites, including a tunnel more than 200 metres (656ft) long.

More than 30 people were apparently trapped inside when the torrent of icy water swept down the valley, carrying rocks and earth as it gathered speed.

There has been no contact with them since. The rescue teams hope to clear the tunnel by nightfall.

Hundreds of troops, paramilitaries and military helicopters have been sent to the region to help with rescue efforts.

An investigation is continuing into what caused the glacial burst.

media captionThe moment the deluge of water washed away parts of the dam

Speaking from hospital, one man described the moment the tunnel flooded.

“We heard screams, ‘get out, get out’. We didn’t know what was happening. We started running to escape when the force of the water gushed in through the mouth of the tunnel. We couldn’t get out because of that,” he said.

“We held on to the [roof] of the tunnel. We held on for about an hour. As the water receded, we slowly climbed onto the big rocks that flowed in, to take a breath. We had lost hope. We didn’t think we would survive.”

Uttarakhand police said an avalanche struck at about 11:00 local time (05:30 GMT) on Sunday, destroying a dam known as the Rishiganga Hydroelectric Project.

Police said the impact catapulted water along the Dhauliganga river, damaging another power project downstream in the Tapovan area.

Senior police officials said a bridge in the Tapovan area that connected 13 villages was washed away in the avalanche. Food packets were air dropped in some of these villages.

One witness compared the flash flood with “a scene from a Bollywood film”.

Video showed the floodwater barrelling through the area, leaving destruction in its wake.

media captionWatch the moment a man trapped inside the tunnel is rescued

Emergency workers had earlier evacuated dozens of villages, but authorities later said the main flood danger had passed.

Emergency crews rescued 16 workers who had been trapped inside a tunnel filled with debris.

Officials told the BBC that between 35 and 40 others were thought to be trapped in a second tunnel.

Emergency crews have reached the mouth of the 2.5km (1.5 mile) tunnel and are in the process of clearing the area with heavy equipment.

“We are trying to break open the tunnel,” said Ashok Kumar, the state police chief, told the Reuters news agency. Rescuers had gone 150m inside, he added.

The director general of the National Disaster Response Force told ANI news agency that rescue operations could take up to 48 hours.

image copyrightEPA

image captionOfficials fear that as many as 35-40 people may be trapped in the tunnel

Uttarakhand, in the western Himalayas, is prone to flash floods and landslides.

Some 6,000 people are believed to have been killed in floods in June 2013 which were triggered by the heaviest monsoon rains in decades.

What caused the glacial burst?

Navin Singh Khadka, BBC World Service environment correspondent

The remoteness of where this happened means no-one has a definitive answer, so far.

Experts say one possibility is that massive ice blocks broke off the glacier due to a temperature rise, releasing a huge amount of water.

That could have caused avalanches bringing down rocks and mud.

“This is a strong possibility because there was a huge amount of sediment flowing down,” said DP Dobhal, a senior glaciologist formerly with the government’s Wadia Institute of Himalayan Geology.

Experts say an avalanche could also have hit a glacial lake that then burst.

Another possibility is that an avalanche or landslide may have dammed the river for some time, causing it to burst out after the water level rose.

Sunday’s disaster has prompted calls by environment groups to review power projects in the ecologically sensitive mountains.

“Avalanches are common phenomena in the catchment area,” MPS Bisht, director of the Uttarakhand Space Application Centre, told AFP news agency.

“Huge landslides also frequently occur.”

Uma Bharti, a former water resources minister, said she had spoken out against power projects on the Ganges and its tributaries.

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