The seven lakes that supply water to Mumbai have just 9.89 per cent stock left in them, which is enough to last a month. The reservoirs have less water compared to the last two years as their catchment areas have received little rain this time. If doesn’t rain, sources said, the corporation will wait for a week before taking a call on rationing supply.

According to the civic body, the lakes—Upper Vaitarna, Modak Sagar, Tansa, Middle Vaitarna, Bhatsa, Vihar and Tulsi—collectively had 1.43 lakh million litres of water on Wednesday. “Yes, there is a delay in the rain and the water stock is reducing. But we have not yet decided on water cut,” said Sanjay Aarthe, chief engineer of BMC’s hydraulic department.