riskbycounty
FEMA National Risk Index

Madison County Disaster Risk

Madison County, Idaho

FEMA Risk Rating

Relatively Low

National Percentile

59th

of 3,144 counties

State Rank

#11

of 44 (1 = highest risk)

Flood Risk

58th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Relatively Low

Higher than 58% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Relatively Low

Higher than 70% of US counties

Tornado

Tornado and severe thunderstorm risk

Very Low

Higher than 10% of US counties

Earthquake

Seismic activity and ground shaking risk

Moderate

Higher than 88% of US counties

Risk Advisory: Madison County

Risk Verdict

Madison County shows a relatively low overall disaster risk profile, scoring in the 59th percentile nationally. The county faces moderate hazard exposure relative to other U.S. counties. Standard emergency preparedness is recommended, with attention to the specific hazards that dominate locally.

Hazard Breakdown

Earthquake risk is the dominant hazard for Madison County, scoring in the 88th percentile nationally. It is followed by wildfire risk at the 70th percentile. Additional hazards include flood (58th), tornado (10th).

Preparedness Context

With earthquake risk as the top concern, Madison County residents should secure heavy furniture and appliances, know how to shut off utilities, and keep emergency supplies accessible. Secondary risks such as wildfire also warrant attention in household and community preparedness planning. FEMA recommends all households maintain at least 72 hours of food, water, and medication supplies regardless of specific hazard exposure.

Regional Context

Madison County is significantly riskier than the average county in Idaho. Its composite risk score is 20.1 points higher than the state average, meaning residents face above-average exposure to natural hazards compared to their neighbors.

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Frequently Asked Questions

What is the natural disaster risk in Madison County, ID?
Madison County has a FEMA National Risk Index rating of Relatively Low, placing it in the 59th 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.
What types of natural hazards affect Madison County?
Madison County is evaluated for five major natural hazard types: earthquake (88th percentile), wildfire (70th percentile), flooding (58th percentile), tornado (10th percentile). The highest-risk hazard is earthquake at the 88th 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.
How does Madison County risk compare to the Idaho average?
Madison County's composite risk percentile is 59th, compared to the Idaho state average of 39th percentile. The state's overall risk rating is Very Low. This means Madison County faces higher natural disaster risk than the typical county in Idaho.
Is Madison County at risk for earthquake?
Yes, Madison County's earthquake risk is at the 88th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Madison County is at the 58th percentile.
How is natural disaster risk measured?
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.
Why is Madison County higher risk than average?
Madison County's composite risk score of 59th percentile is above the Idaho state average of 39th percentile. This elevated risk is driven by earthquake exposure (88th percentile), along with wildfire and flooding risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.

Counties with Similar Risk

Bingham County

Idaho

+1.5

Relatively Low

60th percentile

Valley County

Idaho

-3.0

Relatively Low

56th percentile

Shoshone County

Idaho

+4.2

Relatively Low

63th percentile

By Logan Johnson, Founder & Data EditorUpdated Reviewed by Logan Johnson, Founder & Data Editor

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.

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