Before Chennai residents could fully recover from the recent floods, another low pressure is likely to head towards north Tamil Nadu.
A yellow alert has been issued for the rest of the districts, except Kannur and Kasaragod.
Isolated heavy rain is likely over southern and coastal TN, Puducherry, and Karaikal areas from Sunday till next Tuesday, said the met department.
Yellow alert, with a forecast of isolated heavy rain, has been issued across the state on Monday except in Thrissur, Wayanad, Kannur and Kasaragod districts.
Between June 1, when the monsoon season starts, and September 15, the city normally gets 614.3 mm of rainfall.
The weather forecasting agency has also predicted strong winds in the national capital along with the rainfall.
An orange alert is issued as a warning for extremely bad weather with the potential of disruption in commute with road and drain closures and interruption of power supply.
The all-time highest rainfall was 184 mm on August 2, 1961, India Meteorological Department said.
The Defence Wing of Hyderabad on Wednesday, issued an ‘Orange Alert’ for the security situation in the city, from August 13 to August 17.
This kind of weather may prevail at many places in Bhopal, Hoshangabad, Ujjain, Indore, Gwalior and Chambal divisions.
IMD has issued an orange alert for Mumbai, warning of very heavy rains at isolated places with strong winds on Monday as cyclone Tuaktae is likely to pass close to the Mumbai coast.
The Indian Meteorological Department has sounded orange alert across the state barring Thiruvanathapuram, Kollam, Pathnamthitta, Kannur and Kasaragod warning heavy to very heavy rains on Friday.
With the catchment areas of the dam receiving heavy rainfall over the past several days, the water level in the dam has been increasing considerably.
The rising water level in the Idukki dam (it was 2,394.36 feet on Sunday) has triggered fear among the people in the downstream areas.