Introduction : Cyclone Fengal, which struck Tamil Nadu and Puducherry on November 30, 2024, highlighted the critical connection between natural disasters and public health. With wind speeds of 70–90 km/h and heavy rainfall, the cyclone severely impacted 14 districts, particularly Tiruvannamalai, Villupuram, Krishnagiri, and Cuddalore resulting in 12 fatalities, significant property damage, and widespread flooding. Proactive public health measures mitigated the disaster’s immediate and long-term effects.cThe Tamil Nadu government implemented a comprehensive disaster management strategy, emphasizing preparedness, disease surveillance, and rapid response. Key initiatives included advisory teams, district-level control rooms, and task-specific units for medical aid, vector control, and water quality management. Enhanced disease surveillance enabled the early detection and prevention of outbreaks like Acute Diarrheal Disease (ADD).cFrom December 1 to 13, 2024, over 7,870 medical camps provided care to more than 423,000 beneficiaries in the most affected districts. Mobile medical units delivered critical services, including minor ailment treatment, disease detection, and antenatal care for high-risk pregnancies. Vector control activities and water quality management through chlorination minimized the risks of mosquito-borne and waterborne diseases. Choropleth mapping and trend analysis guided resources to high-risk zones, while public awareness campaigns and chemoprophylaxis further strengthened the response. This coordinated, data-driven approach underscores the importance of scalable disaster management strategies to safeguard public health and build resilience in vulnerable regions.