Tamil Nadu weather alert: Chennai, Kanchipuram, Vellore among 21 districts under heavy rain warning; Fishermen advised to stay ashore

The India Meteorological Department (IMD) forecasts heavy rainfall for Tamil Nadu. Twenty-one districts are on alert. Coastal areas are also under warning. Fishermen are advised against going to sea. Sriperumbudur recorded the highest rainfall. The weather is due to cyclonic circulation. Moderate rain with thunderstorms is expected until September 20. Authorities advise caution in low-lying areas.