The department has issued a heavy rain warning for February 21 in the following districts: Mayiladuthurai, Nagapattinam, Thiruvarur, Thanjavur, Pudukkottai, Ramanathapuram, Thoothukudi, Tirunelveli, Kanyakumari and Tenkasi, along with Karaikal. Thunderstorms accompanied by lightning are likely in isolated places.
On February 22, heavy rainfall is expected to continue in Tenkasi, Tirunelveli and Kanyakumari districts. Residents in these regions have been advised to remain cautious, especially in low-lying and coastal areas.