The India Meteorological Department (IMD) has forecast heavy rainfall in parts of Tamil Nadu's delta region on Sunday, 14 June, driven by an atmospheric circulation system prevailing over the northern coastal belt of the state. Several other districts are simultaneously bracing for moderate showers, while Chennai faces a contrasting spell of heat and humidity with temperatures likely touching 39 degrees Celsius.

Districts Under Heavy Rainfall Alert

According to the weather department, Thanjavur, Tiruvarur, Nagapattinam, and Mayiladuthurai districts are expected to bear the brunt of the rainfall during the day. Officials warned that strong winds with speeds of up to 50 kmph may accompany the downpour in isolated pockets, adding to the risk for residents in low-lying and flood-prone areas.

Moderate Rain Across Several Other Districts

Moderate rainfall has been forecast for Chengalpattu, Kancheepuram, Cuddalore, and Tiruvannamalai districts. Similar wet conditions are likely in Kallakurichi, Villupuram, Ariyalur, Perambalur, and Pudukkottai districts, as well as the Union Territory of Puducherry. Meteorologists attributed the sustained moisture influx to the atmospheric circulation anchored over the northern coastal belt, which continues to draw in humidity from the sea.

Chennai Weather: Heat, Humidity and Partial Relief

Chennai and its suburbs are expected to experience hot and humid conditions through much of the day, with temperatures in parts of the city forecast to approach 39°C. However, the IMD has indicated that moderate rain is likely at a few places in Chennai and neighbouring suburban areas later in the day, offering some respite from the oppressive heat. The combination of high temperatures and moisture-laden winds is expected to make conditions particularly uncomfortable for residents through the afternoon hours.

Authorities Issue Precautionary Advisories

Officials have advised people in districts under the heavy rainfall forecast to exercise caution, especially those living in low-lying areas susceptible to water-logging. Residents have also been urged to take necessary precautions during thunderstorms and periods of strong winds. With the southwest monsoon remaining active and local weather systems continuing to influence conditions across Tamil Nadu, authorities are closely monitoring developments and have asked the public to stay updated through official IMD bulletins and alerts.

Context: Intermittent Rains and Localised Flooding Concerns

The forecast follows a spell of intermittent rainfall across several parts of the state in recent days, which has provided relief from summer heat but also raised concerns over localised flooding in vulnerable areas. This pattern is consistent with the early-monsoon behaviour typically seen along Tamil Nadu's delta and coastal districts, where atmospheric systems can intensify rainfall sharply within short windows. Authorities and residents alike are being asked to remain prepared as the weather system is expected to sustain wet conditions through the day.