IMD issued a heavy rainfall warning for Kerala until Monday, with Pathanamthitta, Idukki, Palakkad, Malappuram, and Wayanad on yellow alert today and Sunday, and Pathanamthitta, Kottayam, and Idukki on Monday. Thunderstorms with lightning are likely. Squally winds of 35-45 kmph, gusting to 55 kmph, may affect south Tamil Nadu and the Gulf of Mannar.