As the monsoon sweeps back into Tamil Nadu and Puducherry, residents can expect significant rainfall, especially in the districts of Mayiladuthurai, Nagapattinam, Tiruvarur, Thanjavur, and Pudukottai. With the potential for thunderstorms and lightning strikes, caution is advised. Fishermen should stay ashore amidst the turbulent seas, while Chennai and its neighboring areas brace for some light rains beneath partly cloudy skies.