The forecasted heavy to very heavy rainfall poses risks of waterlogging, localised flooding, and disruption to daily activities in the affected districts. Urban areas, including Chennai, may experience traffic congestion and potential damage to infrastructure due to water accumulation. Agricultural activities in regions like Thanjavur and Nagapattinam could be impacted, with the possibility of crop damage due to excessive rainfall. Residents in low-lying areas are advised to remain vigilant as the risk of flooding increases.