The India Meteorological Department (IMD) on Thursday said that cloud stinging rainstorms and thunderstorms have begun to arrive across the country.
The weather forecaster said that a thunderstorm had broken out at around 4:00 pm and the storm moved towards Kolkata.
Rain was reported at Thiruvallur in Kolkatta district at around 3:00 am.
Meteorologists have confirmed that thunderstorms will continue for several hours, the IMD said.
A storm system was expected to pass over the western coastal region at around 2:30 am.
A rainstorm has also started to develop in Gautam Budh Nagar in western Kerala.
The rainfall is expected to increase over the next 24 hours.