Canyon County Disaster Risk

Canyon County has a FEMA National Risk Index rating of Relatively Low, placing it in the 72th percentile nationally out of 3,144 counties. This composite score reflects the county's overall exposure to natural hazards including floods, wildfires, tornadoes, earthquakes, and hurricanes, weighted by expected annual loss and social vulnerability.

Canyon County is evaluated for five major natural hazard types: wildfire (92th percentile), flooding (80th percentile), earthquake (79th percentile), tornado (21th percentile). The highest-risk hazard is wildfire at the 92th percentile nationally. These scores are derived from FEMA's National Risk Index, which analyzes expected annual loss, social vulnerability, and community resilience for each hazard type.

Canyon County's composite risk percentile is 72th, compared to the Idaho state average of 39th percentile. The state's overall risk rating is Very Low. This means Canyon County faces higher natural disaster risk than the typical county in Idaho.

Yes, Canyon County's wildfire risk is at the 92th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Canyon County is at the 80th percentile.

FEMA's National Risk Index (NRI) calculates risk scores for 18 natural hazard types across all U.S. counties and census tracts. The composite score combines Expected Annual Loss (estimated dollar losses from each hazard), Social Vulnerability (demographic factors affecting disaster impact), and Community Resilience (ability to recover). Percentile scores rank each county against all 3,144 U.S. counties, and risk ratings range from Very Low to Very High.

Canyon County's composite risk score of 72th percentile is above the Idaho state average of 39th percentile. This elevated risk is driven by wildfire exposure (92th percentile), along with flooding and earthquake risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.