The Deep Depression over Southwest Bay of Bengal is expected to move north-northwestwards and intensify further into a Cyclonic Storm tomorrow, 27 November. Hence, heavy rainfall expected for Chennai.

India Meteorological Department said the depression over Bay of Bengal is likely to intensify into a deep depression.

The India Meteorological Department has issued a red alert for rain for Mayiladuthurai, Nagapattinam and Thiruvarur districts in Tamil Nadu and Karaikal in Puducherry.

Heavy rainfall led to waterlogging in various parts of Chennai city on November 26. Streets and roads were flooded with muddy water following heavy rainfall. India Meteorological Department (IMD) issued a yellow alert for heavy rainfall in Chennai from November 27 to 29.

A deep depression in the Bay of Bengal is intensifying and expected to become a cyclonic storm, named Fengal, by November 27. It's currently southeast of Trincomalee, Sri Lanka, and moving towards the Tamil Nadu coast.

Moving north-northwestwards at 12 km/h, the storm system is expected to bypass Sri Lanka’s coast and approach Tamil Nadu within the next two days. However, slightly cooler sea surface temperatures closer to the coastline could weaken the system marginally before landfall.

The system is expected to develop into a cyclonic storm within 24 hours, with potential landfall along Tamil Nadu's coast by the end of the week.