A portion of the Nanda Devi glacier broke off in Uttarakhand’s Chamoli district on February 7, 2021. The sudden flood in the Dhauli Ganga, Rishi Ganga and Alaknanda rivers triggered widespread panic and large-scale devastation.
A glacial lake burst, a cloud burst or an avalanche, the impact of climate change or “development” — scientists are not sure what triggered the sudden surge of water.
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