Mumbai has 7 lakes that supply water to Mumbai of which only Tulsi Lake and Vihar Lake are located within Mumbai. As per the latest reports, water levels in the lakes supplying water to Mumbai have dipped to 1.47 lakh million litres or 10.16 percent of the required supply as on May 31. This is the lowest quantum of water that is left in the seven lakes compared to the last two years.

In 2018, on the same day, the quantum was 19.92 percent or 2.88 lakh million litres. Looking at the current situation of lake water levels of Mumbai lakes, the Brihanmumbai Municipal Corporation's (BMC) hydraulic department will have to start using water from its reserve stock if rain does not arrive in the city till June 15.