The Santacruz station has recorded 197.8 mm of rain so far this month, with the highest recorded in May so far being 387.8 mm reported in 2000.

The IMD has issued a ‘yellow’ alert in the city till Wednesday, and a nowcast warning from the weather bureau stated that heavy rainfall will continue to lash Mumbai throughout Monday, coupled with gusty winds blowing at 40 kmph.

“What we are witnessing right now is monsoon rainfall. The tip of Colaba in south Mumbai recorded extremely heavy rainfall during the morning, mainly due to the intense rainfall in the Raigad district area. Moderate to heavy spell of rainfall will continue throughout the day,” Sushma Nair, scientist at IMD, Mumbai, told The Indian Express on Monday.

This year, Maharashtra witnessed advanced onset of the Southwest Monsoon on Sunday, May 25, ten days before the usual onset date of June 5. This is also the earliest onset of monsoon that Mumbai has seen in 35 years. In 1990, monsoon arrived in Maharashtra on May 20.

Meanwhile, the Brihanmumbai Municipal Corporation’s (BMC) automated weather system shows that the island city recorded an average of 58 mm of rainfall in the past 24 hours, followed by 19 mm and 15 mm in the eastern and western suburbs. Furthermore, the BMC’s data shows that between 6 am and 7 am, Nariman Point recorded the highest average rainfall at 40 mm, followed by 36 mm at Grant Road and 31 mm at Colaba.

Earlier, issuing a nowcast warning at 4 am, the IMD had said that apart from Mumbai, heavy rainfall will lash the districts of Thane, Raigad, Sindhudurg, Ratnagiri, Satara, Kolhapur, and Nashik over the next four hours.

Meanwhile, the heavy rainfall has led to traffic congestion in multiple locations in the city. The areas adjoining the Dadar TT flyover have reported waterlogging, leading to traffic snarls, while King’s Circle flyover alongside areas like Saki Naka in Andheri also recorded slow vehicular movement on Monday morning due to the rainfall.