Uttarakhand glacier burst: What is glacier lake outburst flood and why does it occur?
A part of the Nanda Devi glacier broke off in Uttarakhand's Chamoli district on Sunday, leading to massive floods, that led to the death of 10 people. The deluge also brought spotlight on the 2013 flash floods in the hill states that wiped out settlements and killed over 5,000 people.