sentences:  High population density, coastal flooding and saltwater intrusion and exposure to storm surges makes Ganga, Godavari, Krishna and Mahanadi coastal river deltas "hotspots" of climate change vulnerability.Glaciers are the main source of water for the Himalayan Rivers such as Ganga, Brahmaputra and Indus.67% of Himalayan glaciers have receded in the past decade and continue to diminish with increasing rates.