Chennai, Apr 29: The India Meteorological Department (IMD) has issued an advisory forecasting heavy rainfall across Tamil Nadu over the next three days. Several districts are expected to experience thunderstorms and moderate to intense showers due to a trough extending from north interior Karnataka to the Gulf of Mannar.

On Wednesday, coastal districts along the Western Ghats, southern Tamil Nadu, the delta regions, and Karaikal are likely to receive light to moderate rain accompanied by thunderstorms.

For Thursday, heavy rainfall has been forecast at isolated locations in Nilgiris, Coimbatore, Erode, Salem, Dharmapuri, and Krishnagiri. The intensity is expected to persist on May 1, with Nilgiris, Coimbatore, Erode, Tiruppur, Dindigul, and Theni districts likely to be affected.

For Thursday, heavy rainfall has been forecast at isolated locations in Nilgiris, Coimbatore, Erode, Salem, Dharmapuri, and Krishnagiri. The intensity is expected to persist on May 1, with Nilgiris, Coimbatore, Erode, Tiruppur, Dindigul, and Theni districts likely to be affected.

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Meanwhile, maximum temperatures across Tamil Nadu, Puducherry, and Karaikal are expected to remain largely unchanged until May 3, though a slight increase cannot be ruled out. The IMD has cautioned that high temperatures combined with elevated humidity levels could lead to discomfort in coastal areas.

In Chennai, partly cloudy skies are expected, with maximum temperatures around 38–39°C and minimum temperatures near 28°C. Authorities have advised residents, especially in rain-prone districts, to remain alert for sudden weather changes, including thunderstorms and localized heavy showers.