Heavy rain alert for Erode, Namakkal, Madurai on Tuesday; Chennai to get evening showers
Synopsis
Tamil Nadu's weather department has flagged heavy rain at isolated spots in Erode, Namakkal, and Madurai for Tuesday, with the rain belt shifting to the Nilgiris and western districts by Wednesday. Chennai will get evening thundershowers. Notably, above-normal daytime temperatures are also expected alongside the wet spell — a classic transitional-season pattern across the state.
Key Takeaways
Heavy rain is forecast at isolated places in Erode , Namakkal , and Madurai on Tuesday, 29 September .
Chennai and neighbouring areas are expected to receive light to moderate rain with thunderstorms in the evening or night .
Moderate rain is likely across 16 districts on Tuesday, including areas along the Western Ghats .
By Wednesday , heavy rain shifts to the Nilgiris , Salem , Dharmapuri , and Krishnagiri ; Nilgiris and Coimbatore remain under alert through Thursday .
Maximum temperatures in parts of Tamil Nadu , Puducherry , and Karaikal may be 2 to 4°C above normal on Tuesday and Wednesday.
The heavy rain forecast applies to one or two locations within named districts — not district-wide.
The regional weather department has forecast heavy rain at isolated places in Tamil Nadu's Erode, Namakkal, and Madurai districts on Tuesday, 29 September, while Chennai and its neighbouring areas are expected to receive light to moderate rain with thunderstorms during the evening or night. The three-day outlook points to unsettled weather across large parts of the state, with conditions shifting westward and northward as the week progresses.
Tuesday's Forecast: Districts on Alert
According to the weather bulletin, moderate rain accompanied by strong winds is likely at isolated places across 16 districts on Tuesday. The affected areas include districts along the Western Ghats as well as Tirupattur, Vellore, Ranipet, Kallakurichi, Tiruvannamalai, Dharmapuri, Salem, Tiruchirappalli, and Perambalur. The heaviest rainfall on Tuesday is concentrated in Erode, Namakkal, and Madurai, though the bulletin cautioned that the forecast applies to one or two locations within each district rather than the entire area.
Chennai is expected to remain largely warm through the day, with showers and thunderstorms developing in the evening or at night. The bulletin did not specify how widely the rain would be distributed across the city.
Wednesday and Thursday Outlook
The probability of heavier rain is set to shift toward western and northern Tamil Nadu by Wednesday. One or two places in the Nilgiris, Erode, Salem, Dharmapuri, and Krishnagiri districts are likely to receive heavy rain accompanied by thunderstorms and strong winds. Moderate rain is also expected at isolated places across 16 districts on Wednesday, including Tirupattur, Vellore, and Sivaganga.
The Nilgiris and Coimbatore districts are forecast to experience heavy rain with thunderstorms and strong winds at isolated places on both Wednesday and Thursday, suggesting that unsettled conditions will persist in the western parts of the state over the coming days.
Above-Normal Temperatures Expected Alongside Rain
Despite the wet forecast, the weather department noted that maximum temperatures at a few places in Tamil Nadu, Puducherry, and Karaikal may run 2 to 4 degrees Celsius above normal on Tuesday and Wednesday. This combination of above-normal heat during the day and isolated heavy showers in the evening is characteristic of pre-monsoon and transitional weather patterns in the region.
Residents in thunderstorm-prone localities may experience brief spells of strong winds, while other areas within the same district could remain dry. The bulletin did not provide district-wide rainfall estimates.
What Residents Should Know
The weather department's advisory underlines that the heavy rain forecast is localised — confined to one or two spots within the named districts. Conditions can vary considerably within each district. Those in areas where thunderstorms are expected should remain cautious of strong winds during brief but intense rain spells. The forecast does not indicate widespread flooding risk, though isolated localities in Erode, Namakkal, Madurai, and the Nilgiris belt warrant closer monitoring over the next 48 to 72 hours.
Point of View
And the two-day persistence of the alert for those districts deserves more attention than a routine advisory suggests. The above-normal temperature forecast alongside rain is also a signal worth watching: heat-thunderstorm interactions in transitional seasons can produce sudden, intense downpours that outpace drainage capacity in urban areas like Chennai. Local administrations in flagged districts would do well to pre-position disaster response rather than wait for the rain to arrive.
NationPress
29 Sept 2026
Frequently Asked Questions
Which Tamil Nadu districts are under heavy rain alert on 29 September?
The weather department has forecast heavy rain at isolated places in Erode, Namakkal, and Madurai on Tuesday, 29 September. Moderate rain with strong winds is also expected across 16 other districts, including areas along the Western Ghats and Tirupattur, Vellore, Salem, and Tiruchirappalli.
Will Chennai receive rain today, 29 September?
Yes, Chennai and its neighbouring areas are expected to receive light to moderate rain with thunderstorms in the evening or at night on 29 September. The day is likely to remain largely warm before the showers develop.
What does the weather forecast look like for Wednesday and Thursday?
On Wednesday, heavy rain is likely at one or two places in the Nilgiris, Erode, Salem, Dharmapuri, and Krishnagiri districts, with thunderstorms and strong winds. The Nilgiris and Coimbatore are expected to remain under a heavy rain alert through Thursday as well.
Why are temperatures expected to be above normal despite the rain forecast?
The weather department has noted that maximum temperatures in parts of Tamil Nadu, Puducherry, and Karaikal may run 2 to 4 degrees Celsius above normal on Tuesday and Wednesday. This is characteristic of transitional-season weather, where daytime heat and evening thunderstorms can coexist.
Does the heavy rain forecast apply to entire districts?
No. The weather department clarified that the heavy rain forecast applies only to one or two locations within each named district. Conditions can vary considerably within a district, and some localities may remain dry even as others experience intense rain.
