Heavy rain alert for 6 Tamil Nadu districts; IMD predicts week-long wet spell
Synopsis
A cyclonic circulation over north Kerala is fuelling a week-long wet spell across Tamil Nadu, with the RMC Chennai placing six districts — including Nilgiris, Coimbatore, and Kanniyakumari — under heavy rain and strong wind alerts for Sunday and Monday. Residents in hilly and low-lying areas face the highest risk of waterlogging and disruption.
Key Takeaways
RMC Chennai has forecast heavy rainfall in six Tamil Nadu districts on Sunday, 22 June .
Districts under alert: Tirunelveli (hill areas), Nilgiris , Coimbatore , Dindigul , Theni , and Kanniyakumari .
A second heavy rain alert covers Madurai and Sivaganga districts on Monday, 23 June .
An upper-air cyclonic circulation over north Kerala is the primary driver of enhanced rainfall across southern India.
Wet conditions are expected to persist across Tamil Nadu for at least one week , aided by active southwest monsoon over the Western Ghats.
Chennai faces no major warning but may see moderate rain with thunder and lightning on Sunday.
The Regional Meteorological Centre (RMC), Chennai, has issued a heavy rainfall forecast for six districts of Tamil Nadu on Sunday, 22 June, with wet conditions expected to persist across the state for at least a week. The forecast is driven by an upper-air cyclonic circulation over north Kerala that is amplifying rainfall activity across southern India, including Tamil Nadu, Puducherry, and the Karaikal region.
Districts Under Heavy Rain Alert
Isolated places in the hill regions of Tirunelveli district and the districts of Nilgiris, Coimbatore, Dindigul, Theni, and Kanniyakumari are likely to receive heavy rainfall accompanied by strong winds on Sunday. Residents in these areas — particularly those in hilly terrain and low-lying zones — have been advised to remain cautious, as waterlogging and localised disruptions are possible.
Monday Forecast: Western and Southern TN in Focus
The RMC has also issued a heavy rain alert for Monday, 23 June, covering parts of western and southern Tamil Nadu. Hill areas of Coimbatore district, along with Nilgiris, Dindigul, Theni, Madurai, and Sivaganga districts, are expected to receive isolated heavy rainfall with gusty winds. Moderate rainfall is additionally forecast over the Western Ghats, the Cauvery delta region, and several areas in northern Tamil Nadu through Sunday and Monday.
Why the Wet Spell Is Likely to Last
Meteorologists attribute the sustained activity to the ongoing southwest monsoon over the Western Ghats and adjoining regions, reinforced by the upper-air cyclonic system over north Kerala. The combination is expected to keep rainfall active across Tamil Nadu for at least seven days, offering relief from the heat and humidity that had gripped several parts of the state in recent weeks. Intermittent showers are likely to continue in many districts as long as these atmospheric conditions persist.
Chennai Outlook
The state capital, Chennai, is not under any major weather warning for Sunday. The sky is expected to remain partly cloudy, with moderate rain accompanied by thunder and lightning possible in isolated areas during the day. Occasional showers could provide some respite from the prevailing heat and humidity in the city.
What Officials Are Saying
The weather department has urged the public to follow official forecasts and updates closely, especially in districts under heavy rain and strong wind warnings over the next two days. Authorities are continuing to monitor the evolving weather system and may issue further advisories as conditions develop.
Point of View
But the convergence of an active southwest monsoon and a persistent upper-air cyclonic system over north Kerala adds a layer of intensity that warrants attention beyond standard advisories. Tamil Nadu's hill districts — particularly Nilgiris and Coimbatore — are structurally vulnerable to flash floods and landslips when heavy rain and gusty winds combine, as witnessed in past monsoon seasons. A week-long wet spell also raises questions about urban drainage preparedness in cities like Coimbatore and Madurai, where infrastructure has historically struggled under sustained rainfall. The absence of a Chennai warning should not breed complacency; the city's flood memory from 2015 remains a standing reminder of how quickly conditions can shift.
NationPress
21 Jun 2026
Frequently Asked Questions
Which Tamil Nadu districts are under heavy rain alert on 22 June?
The RMC Chennai has placed six districts under a heavy rain alert for Sunday, 22 June: Tirunelveli (hill areas), Nilgiris, Coimbatore, Dindigul, Theni, and Kanniyakumari. Strong winds are also expected alongside heavy rainfall in these areas.
What is causing the heavy rainfall in Tamil Nadu?
An upper-air cyclonic circulation prevailing over north Kerala is the primary driver, amplifying rainfall activity across southern India. This system is working in tandem with the active southwest monsoon over the Western Ghats, sustaining wet conditions across Tamil Nadu and neighbouring regions.
How long will the wet spell last in Tamil Nadu?
Meteorologists expect rainfall activity to persist across Tamil Nadu for at least one week from Sunday, 22 June. Intermittent showers are likely in many districts as long as the current atmospheric conditions — the cyclonic circulation and monsoon activity — remain in place.
Is Chennai under a heavy rain warning?
No major weather warning has been issued for Chennai. The city is expected to see partly cloudy skies on Sunday with the possibility of moderate rain, thunder, and lightning in isolated areas. Residents can expect some relief from heat and humidity but no severe weather threat.
What precautions should residents in warned districts take?
The weather department has advised residents in districts under heavy rain and strong wind alerts — especially those in hilly and low-lying areas — to remain cautious. Risks include waterlogging and localised disruptions. Authorities recommend following official forecasts and updates closely over the next two days.
