Five federal datasets behind the product

FEMA's RAPT (formerly National Risk Index) is the primary backbone of our scoring system. It provides county-level composite risk scores for 18 natural hazards, normalized to a 0–100 national percentile scale. We use Expected Annual Loss (EAL), Social Vulnerability (SoVI), and Community Resilience indices.

FEMA's National Flood Hazard Layer provides the official digital FIRM flood zones, Base Flood Elevations, and NFIP community status used by lenders, insurers, and federal agencies. We use NFHL to validate FEMA NRI flood scores and to detect parcel-level proximity to special flood hazard areas (SFHA).

NOAA's Storm Events Database provides granular historical event records with fatality counts, damage estimates, and geographic extent for every declared storm event in the United States. We use these records to validate FEMA NRI scores and populate historical event timelines.

The USGS National Seismic Hazard Maps provide probabilistic ground motion estimates at 2% probability of exceedance over 50 years — the standard for building code and insurance actuarial use. We use USGS PGA values to validate FEMA NRI earthquake scores.

The USDA Forest Service Wildfire Hazard Potential dataset integrates fire weather, fuel loads, and terrain to produce a relative index of wildfire likelihood and intensity. We use WHP to supplement FEMA NRI wildfire scores, particularly for urban-wildland interface analysis.

EPA's EnviroAtlas and Air Quality Index data provide environmental context for our heat exposure analysis. We use EPA AQI data as a secondary signal for communities where extreme heat and air quality interact — particularly in the American Southwest and Southeast.