Overview
- Tamil Nadu’s weather office issued orange and yellow alerts for multiple districts, including Chennai, from Oct. 21–24 as a well-marked low-pressure area formed over the southwest Bay of Bengal.
- RMC Chennai says the system is likely to consolidate into a depression near the north Tamil Nadu–south Andhra coast by midweek, bringing widespread heavy to very heavy rain.
- Chennai saw extensive waterlogging, with flooded roads and visuals of an inundated airport runway after Diwali downpours; more spells are forecast for the city and nearby districts.
- A flood alert was raised in Madurai after the Vaigai River swelled, and landslides in the Nilgiris led Southern Railway to suspend Nilgiri Mountain Railway services between Kallar and Coonoor.
- Authorities expanded relief readiness, including additional shelters in Chennai, advised fishermen to stay ashore due to rough seas and strong winds, and managed reservoir releases to reduce downstream risk.