Counties in California by national Risk Index score (FEMA), 2025
Los Angeles County had the highest national Risk Index score (FEMA) of 58 counties in 2025, at 100. Alpine County had the lowest, at 10.6. The median was 94.8. Source: the Federal Emergency Management Agency.
Map of counties, 2025
- Under 81
- 81 to 90
- 90 to 95
- 95 to 97
- 97 to 99
- 99 and over
All counties, 2025
Full ranking
About this ranking
FEMA's composite natural hazard risk score for a US county, from 0 to 100: the county's national percentile rank among all counties for risk, which combines expected annual losses from 18 natural hazards with social vulnerability and community resilience. Higher means more risk.
The period is the year of the National Risk Index edition (the December 2025 edition is 2025), not a year of events. FEMA rebuilds the index with new data and methods in each edition, so values from different editions are not a time series. The index is meant for nationwide comparison and planning, not as a local risk assessment.
Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.
How to cite
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE). https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Retrieved 2026-10-12. This product uses the FEMA National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).Citation styles
APA 7
Federal Emergency Management Agency. (2025). National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE) (Counties in California by national Risk Index score (FEMA), 2025) [Data set]. Retrieved October 12, 2026, from https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355
MLA 9
National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE), Counties in California by national Risk Index score (FEMA), 2025. Federal Emergency Management Agency, 16 Dec. 2025, https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Invokely, https://invokely.ai/rankings/national-risk-index-score/california-counties. Accessed 12 Oct. 2026.
Chicago (author-date)
Federal Emergency Management Agency. 2025. National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE). Counties in California by national Risk Index score (FEMA), 2025. Dataset. Accessed October 12, 2026. https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Also distributed by Invokely, https://invokely.ai/rankings/national-risk-index-score/california-counties.
Harvard
Federal Emergency Management Agency (2025) National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE), Counties in California by national Risk Index score (FEMA), 2025 [Dataset]. Available at: https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355, via Invokely: https://invokely.ai/rankings/national-risk-index-score/california-counties (Accessed: 12 October 2026).
BibTeX
@misc{federal_counties_in_california_by_2025,
author = {{Federal Emergency Management Agency}},
title = {{National Risk Index Counties, National Risk Index Score Composite (RISK\_SCORE): Counties in California by national Risk Index score (FEMA), 2025}},
year = {2025},
howpublished = {Data set},
url = {https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355},
urldate = {2026-10-12},
note = {Accessed via Invokely, https://invokely.ai/rankings/national-risk-index-score/california-counties. Publisher attribution: Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties, National Risk Index Score Composite (RISK\_SCORE). https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Retrieved 2026-10-12. This product uses the FEMA National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).},
}
RIS
TY - DATA
AU - Federal Emergency Management Agency
TI - National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE): Counties in California by national Risk Index score (FEMA), 2025
PY - 2025
DA - 2025/12/16
PB - Federal Emergency Management Agency
DB - Invokely
UR - https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355
L2 - https://invokely.ai/rankings/national-risk-index-score/california-counties
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/national-risk-index-score/california-counties.
N1 - Publisher attribution: Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE). https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Retrieved 2026-10-12. This product uses the FEMA National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
ER -
Use this data in your AI agent
Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:
Rank Counties in California by national Risk Index score (FEMA) using official data, and cite the source.
rank_places {"indicator":"nri_risk_index_score","level":"province","within":"California","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=nri_risk_index_score&level=province&within=California&limit=10Questions
Which county has the highest national Risk Index score (FEMA)?
Los Angeles County, with 100 in 2025, according to the Federal Emergency Management Agency.
Which county has the lowest national Risk Index score (FEMA)?
Alpine County, with 10.6 in 2025.
Where does this ranking come from?
Every value comes from one source and one period, so the places are comparable: Federal Emergency Management Agency, National Risk Index Counties, National Risk Index Score Composite (RISK_SCORE). Retrieved 2026-10-12.
National Risk Index score (FEMA): other rankings
Counties in California: more rankings
- Expected annual loss from natural hazards (FEMA National Risk Index)
- Average annual temperature
- Share of days unhealthy for sensitive groups or worse (US EPA AQI)
- Share of days with good air quality (US EPA AQI)
- Real GDP growth
- Gross domestic product (GDP), US dollars
- GDP per capita, US dollars
- Uninsured rate, under 65 (US model-based estimate)