The lakes outside the city limits, which fall under the catchment area, have finally received heavy rainfall. Consequently, the water stock has significantly increased in the last 24 hours, providing water supply equal to 18 days. Following Tulsi, Tansa Lake is also nearing overflow. Vihar Lake, located within the city, is also close to being full. Last year, when the water stock was at a similar level, the water cut was withdrawn after the stock reached 75 percent.

The city has experienced heavy to very heavy rain since last week, but the lakes hadn't seen much rainfall. As the rain eased in Mumbai, lakes on the borders of Thane and Nashik received heavy showers. Modak Sagar reported 148 mm of rainfall, while Middle Vaitarna recorded 103 mm. Other lakes also received substantial rainfall, resulting in a combined water stock increase of 84,407 million litres, enough to supply the city for 18 days. The stock rose by only 12 per cent in the seven days up to Monday, but it surged by another six per cent within a day. Lake levels may rise further due to the percolation effect.