The deep depression over the Southwest Bay of Bengal is set to intensify into a cyclone in the next 12 hours.

Schools and colleges in several regions of Tamil Nadu have been shut.

Educational institutions have also been closed in Puducherry.

Fishermen have been asked not to venture into the southwest Bay of Bengal till November 29.

Fishermen who are already in the middle of the sea have been asked to return to the coast.

"The deep depression over the Southwest Bay of Bengal moved north-northwestwards with a speed of 13 kilometers per hour (kmph) during the past 6 hours and lay centred at 0530 hours IST as of today," Indian Meteorological Department (IMD) said as quoted by NDTV.