Cassia County Disaster Risk
Cassia County, Idaho
FEMA Risk Rating
Relatively Low
National Percentile
44th
of 3,144 counties
State Rank
#19
of 44 (1 = highest risk)
Flood Risk
53th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Relatively Low
Higher than 53% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Relatively High
Higher than 95% of US counties
Tornado
Tornado and severe thunderstorm risk
Very Low
Higher than 10% 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 Cassia County, Idaho
Cassia ranks moderately low nationally
Cassia County scores 43.58, placing it slightly above the national average with relatively low overall risk. The score reflects elevated wildfire and earthquake exposure, offset by lower flood and tornado threats.
Above-average risk for Idaho
At 43.58, Cassia exceeds Idaho's state average of 38.51, ranking it in the middle-to-upper tier of state counties. The score reflects this southeastern county's position along major fire corridors.
Riskier than neighboring Twin Falls
Cassia's 43.58 score exceeds many neighboring southeastern Idaho counties, driven largely by its 94.69 wildfire score—the highest in the state. Caribou (7.22) to the north faces far less overall exposure.
Wildfires and earthquakes dominate Cassia
Wildfire risk scores an exceptional 94.69—the highest in all of Idaho—while earthquake exposure reaches 74.46, making these the defining hazards. Flood risk of 52.74 is moderate; tornado risk is minimal at 9.83.
Wildfire coverage is absolutely critical
Cassia's 94.69 wildfire score is the state's highest, making standalone wildfire insurance non-negotiable for all homeowners here. Add earthquake coverage to comprehensive protection, as your 74.46 earthquake score also demands dedicated policy language.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in Cassia County
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: Cassia County
Risk Verdict
With a national percentile rank of 44th, Cassia County faces below-average hazard exposure relative to U.S. counties as a whole. The 44th percentile national ranking is one lens; Cassia County residents also benefit from reviewing which specific hazard types drive the county's composite score and preparing accordingly.
Hazard Breakdown
Wildfire risk is Cassia County's dominant natural hazard, ranked at the 95th percentile nationally under FEMA's National Risk Index. Earthquake ranks second at the 74th percentile nationally. Additional tracked hazards include flood (53th percentile), tornado (10th percentile).
Preparedness Context
At the 95th percentile nationally for wildfire risk, Cassia County households benefit from creating defensible space — a buffer of reduced vegetation around structures — and reviewing whether homeowners insurance covers wildfire damage in this region. A secondary earthquake exposure at the 74th percentile nationally means Cassia County residents face hazards from two distinct natural peril categories during different seasons. Enrolling in the county's wireless emergency alert system and keeping a vehicle at least half-full during peak fire season are low-cost habits that dramatically reduce evacuation lag time for Cassia County residents.
Regional Context
At 5.1 points above the Idaho state average, Cassia County carries meaningfully higher natural disaster exposure than a typical Idaho county.
Is your household prepared for Cassia County's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in Cassia County, ID?
What types of natural hazards affect Cassia County?
How does Cassia County risk compare to the Idaho average?
Is Cassia County at risk for wildfire?
How is natural disaster risk measured?
Why is Cassia 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.