CHENNAI: Coastal Tamil Nadu and certain interior parts in the state experienced widespread rain on Wednesday as the depression weakened into a well-marked low-pressure area. Chennai, Thiruvallur are and Chengalpattu to receive heavy rains, said IMD. 

IMD has announced an orange alert for 7 districts - Chennai, Thiruvallur, Chengalpattu, Kancheepuram, Ranipet, Nilgiris and Coimbatore. 

Yellow alert for, Ariyalur, Perambalur, Thanjavur, Tiruvarur, Nagapattinam, Pudukottai, Tiruchirapalli, Ramanathapuram, Theni, Thenkasi, Tirunelveli and Karaikal.

“The depression (remnant of cyclonic storm Ditwah) over southwest Bay of Bengal and adjoining north Tamil Nadu-Puducherry coasts moved slowly southwestwards and weakened into a well-marked low-pressure area over north Tamil Nadu-Puducherry coasts and neighbourhood,” the IMD said.

It was very likely to continue to move southwestwards slowly across north coastal Tamil Nadu and Puducherry and weaken further into a low-pressure area during the next 24 hours, the weather office said in its bulletin associated with this system.

Villupuram, Cuddalore, Tiruvannamalai too experienced heavy frequent spells with brief intervals, as the depression moved inland.