Tuesday: isolated heavy rain in Erode, Namakkal and Madurai.
Evening thunderstorms expected in Chennai.
Wednesday‑Thursday: heavy rain shifts to Nilgiris and Coimbatore.
Maximum temperatures could be 2‑4 °C above normal.
Erode, Namakkal and Madurai are expected to receive the most intense rainfall on Tuesday.
Later, the rain will move toward the Nilgiris and Coimbatore, with thunderstorms possible.
Temperatures in some areas may be a few degrees higher than the seasonal average.
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