The FEMA National Risk Index is the most comprehensive natural disaster risk assessment dataset available for the United States, delivering critical data on natural hazard risks, social vulnerability, and community resilience across all 50 states, territories, and tribal areas. Designed to support evidence-based decision making, the National Risk Index evaluates expected annual losses from 18 major natural hazards – including floods, wildfires, earthquakes, hurricanes, tornadoes, drought, coastal flooding, winter storms, and volcanic activity – at both county and Census tract levels.
How the National Risk Index Is Built
Developed through extensive collaboration with federal agencies, academic institutions, and private sector partners, the National Risk Index combines historical loss data, hazard frequency analysis, and economic modeling to calculate Expected Annual Loss values for every community in the country. Beyond raw hazard exposure, the dataset integrates social vulnerability indicators – such as demographic characteristics, socioeconomic status, household composition, and housing conditions – that measure how susceptible a community is to adverse effects from natural disasters. Community resilience metrics further assess a community's capacity to prepare for, adapt to, and recover from hazard events.
Who Uses National Risk Index Data – and How
The National Risk Index is an essential resource for emergency managers, urban planners, insurance professionals, and researchers. Key applications include disaster preparedness planning, risk-based resource allocation, hazard mitigation strategy development, climate adaptation planning, and insurance risk modeling. Its standardized methodology and comprehensive geographic coverage make it uniquely suited for comparative risk analysis across regions and hazard types. Regular updates incorporating the latest hazard occurrence data, demographic shifts, and infrastructure assessments ensure the index remains accurate and actionable.
Access National Risk Index Data with Social Explorer
Ready to explore National Risk Index data for your community or region? Sign up for a free trial of Social Explorer and get instant access to the full National Risk Index dataset alongside dozens of other demographic and environmental data sources. Visualize risk at the county or Census tract level, create custom maps, and generate reports – all in one intuitive platform. Start your free trial today and turn complex risk data into clear, actionable insights.