According to a new IIT Gandhinagar study, about 450 cubic kilometres of groundwater has been lost in northern India during 2002-2021. It's about 37 times the quantity of water the Indira Sagar dam -- India's largest reservoir -- can hold at full capacity

Last week, the total capacity was 23 per cent of the storage capacity of these reservoirs. As the temperature rose, a week-on-week decline has been seen in the reservoir level for the past three months. 

Warmer groundwater is harmful for the rich array of life found underground – and for the many plants and animals that depend on groundwater for their survival.