Insights on Health Burden, Needs, and Prevention Strategies After the Flood Catastrophe in Southern Brazil

Brazil has experienced a significant increase in climate emergencies and environmental disasters. Rio Grande do Sul (RS), the southern state of the country, shows an annual rise in climate, hydrological, and meteorological disasters, underscoring its vulnerability to extreme events and the urgent need for proactive mitigation and adaptation strategies. Despite this growing concern, the literature has provided limited focus on the specific public health demands arising from these disasters, particularly regarding prevention. This debate article highlights the short-, medium-, and long-term health needs following the recent floods in RS, integrating disaster prevention science to enhance preventive actions. Floods have profound mental health and behavioral consequences, including increased rates of post-traumatic stress disorder, depression, and anxiety, particularly among displaced individuals and first responders. This analysis uses the RS case to illustrate a multi-tiered prevention approach-spanning primary, secondary, tertiary and quaternary measures-while presenting a model that could be adapted to similar vulnerable regions worldwide. By emphasizing early detection, strategic resource allocation, and evidence-based interventions, the findings highlight the importance of structured responses in minimizing health risks, bolstering community resilience, and preventing health deterioration in climate-vulnerable regions.