Twin Falls County Disaster Risk
Twin Falls County, Idaho
FEMA Risk Rating
Relatively Low
National Percentile
47th
of 3,144 counties
State Rank
#16
of 44 (1 = highest risk)
Flood Risk
51th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Relatively Low
Higher than 51% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Moderate
Higher than 94% of US counties
Tornado
Tornado and severe thunderstorm risk
Very Low
Higher than 13% of US counties
Earthquake
Seismic activity and ground shaking risk
Relatively Low
Higher than 74% of US counties
Risk Overview
About Natural Disaster Risk in Twin Falls County, Idaho
Twin Falls County has relatively low disaster risk
With a composite risk score of 46.95, Twin Falls County sits below the national average and ranks as relatively low-risk for natural disasters. This places the county in a safer zone compared to most U.S. counties, though still above several Idaho peers.
Mid-range risk among Idaho counties
Twin Falls County scores 46.95 against Idaho's state average of 38.51, placing it in the middle tier of the state's 44 counties. While not the safest, it faces lower combined disaster risk than many other Idaho communities.
Riskier than Teton and Washington counties
Twin Falls County (46.95) faces noticeably higher disaster risk than neighboring Teton County (29.45) and Washington County (30.31). Valley County presents a comparable threat profile at 55.63, making Twin Falls relatively positioned between safer and higher-risk neighbors.
Wildfires and earthquakes lead threats
Wildfire risk dominates Twin Falls County's hazard profile at 93.96, while earthquake exposure stands at 73.95—both substantially above many U.S. counties. Flood risk (51.11) adds a secondary concern, though tornadoes remain minimal at 13.42.
Bundle wildfire and earthquake insurance
Twin Falls County residents should add wildfire and earthquake coverage to standard homeowners policies, which exclude both hazards. These two risks account for most of your county's natural disaster exposure and warrant dedicated protection.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in Twin Falls County
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: Twin Falls County
Risk Verdict
Twin Falls County's FEMA risk score places it at the 47th percentile nationally, indicating lower-than-typical exposure for a U.S. county. Residents of Twin Falls County can use the 47th percentile ranking as a baseline, while recognizing that individual properties may still lie in specific hazard zones that differ from the county average.
Hazard Breakdown
Wildfire risk is Twin Falls County's dominant natural hazard, ranked at the 94th percentile nationally under FEMA's National Risk Index. Earthquake ranks second at the 74th percentile nationally. Additional tracked hazards include flood (51th percentile), tornado (13th percentile).
Preparedness Context
Twin Falls County sits at the 94th percentile for wildfire exposure. Signing up for Twin Falls 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. Alongside wildfire, earthquake at the 74th percentile nationally means a multi-season preparedness mindset — fire season and flood or storm season often require different household plans. In Twin Falls 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 8.4 composite points below Twin Falls County's score, a gap that reflects the county's elevated position in the state's hazard distribution.
Is your household prepared for Twin Falls County's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in Twin Falls County, ID?
What types of natural hazards affect Twin Falls County?
How does Twin Falls County risk compare to the Idaho average?
Is Twin Falls County at risk for wildfire?
How is natural disaster risk measured?
Why is Twin Falls 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.