Two teams of glaciologists will head to Joshimath-Tapovan on Monday to study the causes of massive flood caused after a part of the Nanda Devi glacier broke off in Uttarakhand's Chamoli district, the director of the Wadia Institute of Himalayan Geology said.
The teams carried out a helicopter survey of the area on Tuesday to find clues as to what led to the massive flash floods that swept everything on the way.
Many families in the affected area are finding it hard to sever their emotional ties with their homes and move out.
The number of subsidence-affected homes rose to 678 while 27 more families were evacuated to safety, a bulletin from the Disaster Management Authority in Chamoli said, adding so far 82 families have been shifted to safe locations in the town.
At the devastated Tapovan power project site rescuers worked nonstop even as the odds of finding the trapped workers alive seemed slim.
Using drones and remote-sensing equipment, rescue teams intensified efforts on Wednesday to reach the 25-35 men trapped in a sludge-choked tunnel since the Uttarakhand glacier disaster three days ago and more than 170 remained missing, hopes of finding them alive fading with every passing hour.