The India Meteorological Department has issued a red alert for the Mumbai Metropolitan Region (MMR) and some other parts of Maharashtra for Wednesday.

The red alert was issued for the second consecutive day as rains have been lashing Mumbai and adjoining districts since Tuesday night.

"The red alert of extremely heavy rainfall at isolated places has been issued for Wednesday. The probability of it is very likely, which means it could actualise up to 75 per cent," an IMD official said here.

The alert was issued for Mumbai, Thane, Palghar, Raigad, Pune, Ahmednagar and Nashik districts, he said.

While the warning for Mumbai is only for Wednesday, that for Thane, Palghar and Nashik is for Wednesday and Thursday, the official said.

Extremely heavy rainfall is defined as a rainfall above 204.4 mm in 24 hours, he said.