Tamil Nadu cyclone update: On Wednesday, October 22, 2025, heavy rain continued to lash northern districts of Tamil Nadu including Chennai and Tiruvallur since midnight, driven by a developing low-pressure system in the Bay of Bengal.
Since midnight, heavy rainfall has been reported in Chennai, Tiruvallur, and other northern districts of Tamil Nadu. The downpour has been consistent, raising concerns over waterlogging and localized flooding in low-lying urban areas.The Regional Meteorological Centre confirmed that a low-pressure area has developed over the southwest Bay of Bengal, which is expected to intensify further. According to the latest update
A deep depression is currently prevailing over the region It is likely to move west-northwestwards toward the north Tamil Nadu-Puducherry and south Andhra Pradesh coasts in the next 24 hours Simultaneously, an atmospheric circulation is active over the south Andaman Sea, potentially contributing to continued instability
Additionally, heavy to very heavy rainfall is likely in Chennai, Tiruvallur, Kanchipuram, Ranipet, Tiruvannamalai, Kallakurichi, and Puducherry, among others. Several central and western districts including Tiruchirappalli, Vellore, Tirupattur, Dharmapuri, and Pudukkottai are also expected to receive significant rain.
North Tamil Nadu, Puducherry, Karaikal: Light to moderate rain with thunder and lightning at many places Chennai, Tiruvallur, Chengalpattu, Kanchipuram, Ranipet: Heavy to very heavy rainfall Vellore, Tirupattur, Villupuram, Kallakurichi, Cuddalore: Heavy rain at isolated places
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