The Regional Meteorological Centre (RMC) has forecast heavy to very heavy rain at isolated places in Mayiladuthurai, Nagapattinyam, Tiruvarur, Thanjavur, Pudukkottai, Ariyalur, Perambalur, Tiruchi, Karur, Cuddalore, Nilgiris, Coimbatore, Tiruppur, Sivaganga and Karaikal districts area on Sunday.

Isolated places in Theni, Dindigul and Madurai districts are likely to get extremely heavy rainfall, and have been issued a red alert.

Heavy rain is likely to occur at isolated places over Tiruvallur, Chennai, Chengalpattu, Kancheepuram, Villupuram, Kallakurichi, Vellore, Ranipet, Tirupattur, Tiruvannamalai, Namakkal, Salem, Dharmapuri, Krishnagiri, Erode, Virudhunagar, and Kanyakumari districts, and Puducherry.

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