Canyon County Disaster Risk
Canyon County, Idaho
FEMA Risk Rating
Relatively Low
National Percentile
72th
of 3,144 counties
State Rank
#6
of 44 (1 = highest risk)
Flood Risk
80th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Relatively Low
Higher than 80% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Moderate
Higher than 92% of US counties
Tornado
Tornado and severe thunderstorm risk
Very Low
Higher than 21% of US counties
Earthquake
Seismic activity and ground shaking risk
Relatively Low
Higher than 79% of US counties
Risk Overview
About Natural Disaster Risk in Canyon County, Idaho
Canyon faces relatively low national risk
Canyon County scores 71.72, placing it in the relatively low risk category despite some elevated wildfire exposure. The score reflects balanced threats across multiple hazard types.
Above-average risk for Idaho
At 71.72, Canyon's composite risk nearly doubles Idaho's state average of 38.51, making it one of the state's higher-exposure counties. Only a handful of Idaho counties exceed Canyon's hazard profile.
Riskier than much of southwestern Idaho
Canyon's 71.72 score exceeds Owyhee and Gem counties' typical profiles, reflecting its location along major flood corridors and wildfire zones. Adjacency to Bonneville (82.41) puts Canyon in a notably active hazard region.
Wildfires, earthquakes, and floods threaten Canyon
Wildfire risk scores an elevated 92.49, while earthquake exposure reaches 78.85 and flood risk is 80.31—making this a triple-threat county. Tornado risk of 20.77 is moderate compared to other Idaho counties.
Bundle flood, wildfire, and earthquake coverage
Canyon County's 92.49 wildfire score, 80.31 flood score, and 78.85 earthquake score demand comprehensive protection beyond standard homeowners insurance. Secure separate policies for all three hazards to ensure full household protection.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in Canyon County
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: Canyon County
Risk Verdict
Canyon County's FEMA risk score places it at the 72th percentile nationally, indicating lower-than-typical exposure for a U.S. county. A moderate composite score often means one or two hazard categories are doing the heavy lifting — knowing which ones matters for preparation.
Hazard Breakdown
Wildfire risk is Canyon County's dominant natural hazard, ranked at the 92th percentile nationally under FEMA's National Risk Index. Flood ranks second at the 80th percentile nationally. Additional tracked hazards include earthquake (79th percentile), tornado (21th percentile).
Preparedness Context
Canyon County sits at the 92th percentile for wildfire exposure. Signing up for Canyon County's county emergency alert system and knowing the pre-planned evacuation route before conditions deteriorate are the two highest-value preparedness actions for residents here. The county's flood exposure at the 80th percentile nationally complements the wildfire risk — saturating rain after burn scarring often triggers secondary flood and debris flow events. In Canyon County, wildfire smoke often precedes the flame front by hours or days; households benefit from tracking EPA's AirNow.gov and having HEPA air filtration available as a first line of indoor protection when air quality alerts are issued.
Regional Context
The Idaho county average is 33.2 composite points below Canyon County's score, a gap that reflects the county's elevated position in the state's hazard distribution.
Is your household prepared for Canyon County's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in Canyon County, ID?
What types of natural hazards affect Canyon County?
How does Canyon County risk compare to the Idaho average?
Is Canyon County at risk for wildfire?
How is natural disaster risk measured?
Why is Canyon County higher risk than average?
Data Source
Risk data sourced from the FEMA National Risk Index (NRI). Risk scores are relative rankings (0–100) across all US counties — not absolute risk measures. Higher scores indicate higher relative risk compared to other counties.
Disclaimer: This data is informational only. It is not financial, insurance, or legal advice. Always consult a qualified professional before making insurance or real estate decisions.