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Tamil Nadu News Updated Jul 16, 2026

Heatwave Alert for 19 Tamil Nadu Districts; Chennai Braces for Humid 39°C

The India Meteorological Department has issued a heatwave warning for 19 districts of Tamil Nadu on Thursday. Residents are advised to avoid sun exposure and stay hydrated as temperatures peak in the afternoon. Light rainfall is expected over the Western Ghats and north coastal districts, but humid conditions will persist. Chennai is forecast to reach 39°C, with authorities urging vulnerable groups to limit outdoor activities.

Heatwave alert for 19 TN districts; humid conditions to prevail in Chennai

Chennai, July 16

The India Meteorological Department has issued a heatwave warning for 19 districts of Tamil Nadu on Thursday, cautioning that soaring temperatures and high humidity could lead to heat-related illnesses across several parts of the state.

According to the weather department, districts likely to experience heatwave conditions today include Madurai, Tirupattur, Vellore, Ranipet, Kallakurichi, Tiruvannamalai, Kancheepuram, Krishnagiri, Dharmapuri, Salem, Namakkal, Karur, Erode, Tiruchy, Ariyalur, Perambalur, Sivaganga, Virudhunagar and Dindigul.

Residents in these districts have been advised to avoid prolonged exposure to the sun, remain hydrated and take necessary precautions, particularly during the afternoon hours when temperatures are expected to peak.

The IMD has also forecast that heatwave conditions are likely to continue on Friday in Virudhunagar, Sivaganga, Madurai, Dindigul, Karur, Namakkal and Erode districts, indicating that the intense heat may persist in parts of the interior region for another day.

Meanwhile, a slight change in the speed of the prevailing westerly winds is expected to bring some relief to parts of the state. Light rainfall is likely over the Western Ghats districts until Saturday.

On Friday, one or two places along the north coastal districts of Tamil Nadu may receive moderate rainfall, while light rain is expected in several other parts of the state. Despite the possibility of scattered showers, the weather department warned that high temperatures combined with elevated humidity levels are likely to cause heat-related discomfort along the coastal districts of Tamil Nadu through July 17.

The humid conditions are expected to make the weather feel significantly hotter, even in areas that may not officially record heatwave temperatures.

In Chennai, the maximum temperature is expected to reach around 39 degrees Celsius on Thursday. The combination of high temperature and humidity is likely to result in uncomfortable weather conditions, particularly during the daytime.

Authorities have advised the public, especially children, senior citizens and people with existing health conditions, to limit outdoor activities during peak heat hours and stay well hydrated as the state experiences one of its hottest spells of the season.

— IANS

Reader Comments

Siddharth J

Living in Vellore, and it's absolutely scorching these past two days. The IMD warning is timely, but I worry about auto drivers and construction workers who have no choice but to be outdoors. Also, why doesn't Chennai have better wind corridors anymore? All those high-rises are trapping the heat. Light rain prediction for Western Ghats districts is a small relief at least.

David E

I'm a visitor from the US staying in Chennai for business. You all warned me about the heat, but 39°C with 70% humidity is something else! I've already bought three bottles of electrolyte water today. Can't imagine how locals manage year after year. Kudos to those working outdoors. Hopefully the moderate rainfall on Friday offers some respite.

Priya S

A very important advisory for parents with school-going kids. With holidays on or online classes, it's easier to manage, but children playing outside during peak hours can get sunstroke quickly. I've shifted our family outings to early mornings only. Also, senior citizens in my apartment complex need special attention in this heat—please check on your elderly neighbors. 🙏

Ramesh W

I live in one of the coastal districts mentioned, and honestly, the humidity is what kills you. Even if actual temperature is 2-3 degrees less than inland, the body feels the heat more because of moisture. Hope authorities set up more water shops along bus routes. And kudos to the vegetable vendors who still come out daily despite this blistering weather.

Tanya I

While the warnings are good, I feel the

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