Owyhee County Disaster Risk

Owyhee County has a FEMA National Risk Index rating of Relatively Low, placing it in the 44th 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.

Owyhee County is evaluated for five major natural hazard types: wildfire (96th percentile), flooding (59th percentile), earthquake (35th percentile), tornado (6th percentile). The highest-risk hazard is wildfire at the 96th 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.

Owyhee County's composite risk percentile is 44th, compared to the Idaho state average of 39th percentile. The state's overall risk rating is Very Low. This means Owyhee County faces higher natural disaster risk than the typical county in Idaho.

Yes, Owyhee County's wildfire risk is at the 96th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Owyhee County is at the 59th 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.

Owyhee County's composite risk score of 44th percentile is above the Idaho state average of 39th percentile. This elevated risk is driven by wildfire exposure (96th percentile), along with flooding risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.