Tamil Nadu rain relief: Heavy rainfall alert for 8 districts on Monday
Synopsis
Two atmospheric circulation systems have broken Tamil Nadu's heatwave, drenching districts from Krishnagiri to Nagapattinam on Sunday. With the IMD flagging heavy rain for eight districts on Monday and the southwest monsoon due over Kerala around 26 May, the state's brutal summer may finally be turning a corner — though low-lying areas face fresh waterlogging risk.
Key Takeaways
Widespread rainfall hit multiple Tamil Nadu districts on Sunday, 18 May , easing intense heatwave conditions.
Two atmospheric circulation systems — one over Kanyakumari Sea , another over northeast Tamil Nadu — are driving the wet spell.
Heavy rain caused waterlogging in Dindigul and water accumulation in low-lying areas of Nagapattinam .
IMD has issued a heavy rainfall alert for Nilgiris, Coimbatore, Tiruppur, Theni, Dindigul, Madurai , and Sivaganga on Monday.
Strong winds with heavy rain are forecast for Pudukkottai, Karur, Tiruchy, Erode, Salem, Namakkal, Dharmapuri , and Krishnagiri .
The southwest monsoon is expected to set in over Kerala around 26 May .
Widespread rainfall swept across multiple districts of Tamil Nadu on Sunday, 18 May, easing an intense heatwave and bringing cooler conditions to parched regions. The India Meteorological Department (IMD) has issued a heavy rainfall alert for several districts on Monday, with the wet spell forecast to extend into Tuesday.
What Is Driving the Rain
Two atmospheric circulation systems are currently influencing Tamil Nadu's weather. One is persisting over the Kanyakumari Sea and adjoining areas, while a second has formed over northeast Tamil Nadu and nearby regions. According to weather officials, these systems triggered the widespread showers recorded across the state on Sunday and are expected to sustain rainfall over the coming days.
Districts That Received Rain on Sunday
Moderate rain was recorded in Hosur and surrounding areas of Krishnagiri district, including Madagiri, Jujuvadi, Begepalli, and Bagalur. Sivaganga and nearby localities experienced heavy rainfall accompanied by strong winds for more than an hour, triggering a noticeable temperature drop.
In Dindigul district, Palani and Kodaikanal received nearly two hours of continuous rain, causing waterlogging on several roads. Periyakulam and surrounding areas in Theni district recorded moderate showers lasting over half an hour.
Several localities in Pudukkottai — including the new bus stand area, Thiruvappur, Machuvadi, Thirukokarnam, Bose Nagar, Mettupatti, and Malayedu — reported thunderstorms and steady rainfall. In Madurai district, areas around Thirumangalam such as Pandian Nagar, Vadakarai, Chengulam, Karisalpatti, and Maravankulam witnessed heavy rain with thunder. Nagapattinam district also saw substantial rainfall in Sikkal, Velankanni, Kilvelur, Valivalam, and Thirukkuvalai, leading to water accumulation in low-lying areas.
IMD Alert: What Is Forecast for Monday and Tuesday
The IMD has forecast heavy rainfall on Monday for Nilgiris, Coimbatore, Tiruppur, Theni, Dindigul, Madurai, and Sivaganga districts. Strong winds accompanied by heavy rain are also expected in Pudukkottai, Karur, Tiruchy, Erode, Salem, Namakkal, Dharmapuri, and Krishnagiri districts.
On Tuesday, continued heavy rainfall is forecast for hilly regions of Coimbatore and Tiruppur, along with the Nilgiris, Theni, Dindigul, and Madurai districts. Chennai may see moderate rain with thunderstorms in isolated areas.
Southwest Monsoon Arrival on the Horizon
This pre-monsoon activity comes ahead of the southwest monsoon, which is expected to make its onset over Kerala around 26 May. Historically, the monsoon advances into Tamil Nadu within days of its Kerala landfall, meaning sustained rainfall relief could be weeks away for the state. This year's pre-monsoon showers are providing an early buffer against what has been a punishing summer season.
Point of View
But the IMD alert covering eight districts for Monday signals that the relief comes with its own risks — waterlogging, flash flooding in hilly terrain, and disruption in already-stressed infrastructure. Tamil Nadu's pre-monsoon period increasingly brings this double bind: too hot without rain, too overwhelmed with it. The real question is whether district administrations in Dindigul, Madurai, and Nagapattinam — all of which saw accumulation on Sunday — have drainage systems capable of handling what the IMD is forecasting for the next 48 hours. The southwest monsoon's expected 26 May onset over Kerala adds urgency; preparedness gaps exposed now will be magnified once the monsoon proper arrives.
NationPress
3 Jul 2026
Frequently Asked Questions
Why is it raining in Tamil Nadu in May?
Two atmospheric circulation systems — one over the Kanyakumari Sea and another over northeast Tamil Nadu — are triggering pre-monsoon showers across the state. The IMD says these systems are expected to sustain rainfall over the next several days.
Which Tamil Nadu districts are under heavy rain alert on Monday?
The IMD has forecast heavy rainfall for Nilgiris, Coimbatore, Tiruppur, Theni, Dindigul, Madurai, and Sivaganga on Monday. Strong winds with heavy rain are also expected in Pudukkottai, Karur, Tiruchy, Erode, Salem, Namakkal, Dharmapuri, and Krishnagiri.
When will the southwest monsoon arrive in Tamil Nadu?
The southwest monsoon is expected to set in over Kerala around 26 May, after which it typically advances into Tamil Nadu within days. Pre-monsoon circulation systems are currently providing early rainfall relief ahead of the monsoon's formal onset.
What damage or disruption has the rain caused so far?
Waterlogging was reported on several roads in Palani and Kodaikanal in Dindigul district after nearly two hours of rain. Low-lying areas in Nagapattinam district also saw water accumulation. Sivaganga experienced heavy rain and strong winds for over an hour, causing a sharp drop in temperature.
Will Chennai receive rain in the coming days?
Chennai may witness moderate rain with thunderstorms in isolated areas on Tuesday, according to the IMD forecast. The city is not currently under a heavy rain alert, but conditions could change as the atmospheric systems evolve.
