Three lakes supplying water to Mumbai have started overflowing, with two reaching their desired water levels early Wednesday morning. Vihar lake started overflowing at 12.48 am while Tansa began brimming over at 4.35 am. The total water stock was 58.93 per cent on Wednesday morning, which is 8.52 lakh million litres. The Brihanmumbai Municipal Corporation (BMC) will take a call on rolling back its water cut next week.