Chennai Records 360 mm Rainfall in 24 Hours, Highlights Forecasting Challenges
Chennai Records 360 mm Rainfall in 24 Hours, Highlights Forecasting Challenges
IN · Published Oct 19, 2026
• Chennai experienced an extraordinary rainfall event on 18 October 2026, with North Chennai recording over 360 mm of rain in just 24 hours, according to the Greater Chennai Corporation’s rainfall dashboard.
• The heaviest downpour was concentrated in areas such as Parrys, Kathivakkam, Sathangadu, Ennore, and Kargil Nagar.

Impact & Risks

The intense rainfall caused significant waterlogging in North Chennai, disrupting daily life and exposing the limitations of disaster preparedness for such hyperlocal events. The uneven distribution of rainfall across the city meant that some areas were severely affected while others experienced relatively lighter rain. This has highlighted the vulnerability of urban infrastructure to extreme weather events and the difficulty in predicting their precise impact. The concentrated downpour has also sparked discussions on whether such events should be classified as cloudbursts.

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