The Powai lake in Mumbai started overflowing on Saturday as torrential rains continued to lash the city for the last few days. The lake started overflowing 24 days earlier than compared to last year. Powai Lake, built-in 1890 for Rs 40 lakhs, is one of the most important artificial lakes in Mumbai. Now, the India Meteorological Department (IMD) has issued a red alert for the whole city. Watch this episode of Mumbai Metro.