People in Kolkata woke up to roads and streets overflowing with water today after heavy overnight rain left large parts of the city, especially the low-lying areas, inundated.
The rain was caused by a low-pressure system over Bangladesh and West Bengal, the India Meteorological Department (IMD) said.
Kolkata received 7 per cent more rainfall than usual this month.
Other parts of West Bengal have also been seeing heavy downpour for the last few days, resulting in disruption of rail and road transport.
The weather office recorded extremely heavy rainfall in Panskuru, Diamond Harbour, Ghatal and Debogram in the last 24 hours, while heavy rain occurred in 22 districts including Kalimpong, Kolkata, Midnapore, Tamluk and Salt Lake.
The well-marked low-pressure area is likely to move westwards across Jharkhand and Bihar, the weather office said.
Earlier, it had issued an 'orange alert' for Kolkata, Bankura, Purulia, Purba, Paschim Bardhaman and Hooghly. A 'red alert' has been issued in Howrah, North and South 24 Parganas, Purba and Paschim Medinipur, and Jhargram.
The weather office said heavy rainfall would continue in North and South 24 Parganas, Bankura, Purulia, Paschim Bardhaman, and Paschim Medinipur till tomorrow morning.
Heavy to very heavy rain will also continue in Hooghly, Bankura, Purulia, Purba, and Paschim Bardhaman till this evening.