Uttarakhand dam disaster:Race to rescue 150 people missing in India
The floodwaters burst open a dam and a downpour of water poured through a valley in the province of Uttarakhand on Sunday.
The greater part of the missing are accepted to be labourers from two hydropower plants.
More than 30 individuals were clearly caught inside when the deluge of frosty water cleared down the valley, conveying rocks and earth as it built up momentum.
The passage is impeded with slush and trash.
There has been no contact with the labourers since Sunday, and authorities say it is difficult to tell where in the passage they are and whether they are together.
Many soldiers, paramilitaries and military helicopters have been shipped off the area to assist with salvage endeavours.
An examination is proceeding into what caused the speculated icy burst.
Senior police authorities said an extension in the Tapovan region that associated 13 towns was washed away in the torrential slide. Food parcels were air dropped in a portion of these towns.
Crisis groups safeguarded 16 people who had been caught inside a passage loaded up with flotsam and jetsam.
Authorities said that somewhere in the range of 35 and 40 others were believed to be caught in a subsequent passage.
The chief general of the National Disaster Response Force said that rescue activities could take as long as 48 hours.
Specialists say one chance is that gigantic ice closes severed the ice sheet because of a temperature rise, delivering an immense measure of water.
That might have caused torrential slides cutting down rocks and mud.
Another chance is that a torrential slide or avalanche may have dammed the waterway for quite a while, making it burst out after the water level rose.