About DisasterRiskIndex.com
DisasterRiskIndex.com turns FEMA's public-domain National Risk Index into a free, searchable, per-county view of natural disaster risk across the United States.
Data source & attribution
All risk figures come from the FEMA National Risk Index (NRI), v1.20, released December 2025 under OpenFEMA's public-domain terms. FEMA requests attribution but does not endorse or sponsor this site. Definitions follow FEMA's data dictionary. Per-county disaster histories come from FEMA's Disaster Declarations Summaries (OpenFEMA). City-to-county mappings and city populations are from GeoNames (CC BY 4.0). County boundaries on the risk map are from the US Census Bureau via the us-atlas project.
Who runs this site
I'm Dvir, and DisasterRiskIndex.com is an independent project I built and maintain. I made it because FEMA's National Risk Index is a genuinely useful public dataset that most people have never heard of — and the official tool, while excellent, isn't built for quickly answering "what's the disaster risk where I live, and what should I do about it?"
Every risk figure on this site is FEMA's number, published verbatim — no re-weighting, no editorial adjustment. What I add is navigation, context, and the written guides: those are drafted and edited by me, reviewed against the cited sources before publishing, and updated when the underlying data changes. If you find an error anywhere on the site, email me and I'll fix it.
What the scores mean
Each county's Composite Risk Index (0–100) combines three inputs across 18 hazard types: Expected Annual Loss (the average yearly dollar loss from natural hazards), Social Vulnerability (how sensitive the population is to harm), and Community Resilience (capacity to recover). Ratings run from Very Low to Very High. For the full explanation — formulas, data sources, and limitations — see How the National Risk Index works.
Update cadence
FEMA updates the NRI roughly once a year. This site currently reflects v1.20 (released December 2025) and is republished in full whenever a new version lands. Disaster declaration histories come from OpenFEMA and cover 1953 to present.
Limitations
- Risk is county-level, not address-specific. Your individual property may differ substantially.
- Expected Annual Loss is a statistical average, not a forecast for any given year.
- The NRI is updated roughly annually; figures reflect v1.20.
Contact
Questions or corrections? Email [email protected].