South Mumbai sees 3rd-wettest Sept in nearly 20 years; IMD issues 'yellow alert'

Mumbai: South Mumbai has recorded 586.2mm of rainfall in September 2025, making it the third-wettest September since 2006, according to India Meteorological Department (IMD) data from the Colaba observatory.

The highest September rainfall in recent years was in 2019 (855.8mm), followed by 2016 (733.4mm).

Over the past weekend alone, Colaba logged 222mm of rain in 48 hours (September 27–29), with 120.8mm falling between September 27 and 28 and another 101.2mm between September 28 and 29.

Weather enthusiasts attributed the heavy showers to a mix of thunderstorms and shifting wind patterns.

While a depression over north Madhya Maharashtra triggered northwesterly winds funnelling rain towards the western suburbs and Colaba, a trough line extending across Thane to Colaba further intensified rainfall along this belt.

Consequently, South Mumbai received higher rainfall compared to Santacruz, which recorded 602.4mm so far this month, lower than 657mm in Sept 2024.

Meanwhile, the IMD has scaled down its alert for Mumbai from orange to yellow, forecasting only light to moderate rainfall on Tuesday, Sept 30. A yellow alert indicates heavy showers at isolated locations.

Thanks to the consistent rainfall, Mumbai’s seasonal rainfall has crossed 3,000mm, with Colaba logging 2,245.2mm (155mm above normal) and Santacruz 3,100.4mm (786.7mm above normal).

Water stock in the seven lakes supplying the city is at 97.57% of capacity, nearly the same as last year.