The India Meteorological Department (IMD) has issued a weather alert forecasting widespread heavy rainfall and thunderstorms over Tamil Nadu from October 15 to 20. A total of 16 districts, including Chennai, are expected to be significantly affected by the weather system. Residents have been advised to stay alert, avoid low-lying and flood-prone zones, and keep updated with local forecasts. Local civic bodies are preparing drainage clearance, emergency response teams, and infrastructure checks ahead of anticipated storms.Though beneficial for water reservoirs, excess rainfall may damage crops, cause soil erosion, and disrupt transport services.Travel plans and outdoor events may need to be rescheduled or postponed in the affected areas.This forecast underscores the need for resilient urban planning and improved forecasting systems in Tamil Nadu’s vulnerable coastal and riverine zones.Officials will monitor the system closely, issue advisories, and coordinate disaster management as needed.