Marion County Disaster Risk
Marion County, Indiana
FEMA Risk Rating
Relatively High
National Percentile
97th
of 3,144 counties
State Rank
#1
of 92 (1 = highest risk)
Flood Risk
98th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Relatively High
Higher than 98% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Very Low
Higher than 22% of US counties
Tornado
Tornado and severe thunderstorm risk
Relatively High
Higher than 99% of US counties
Earthquake
Seismic activity and ground shaking risk
Relatively High
Higher than 96% of US counties
Hurricane
Tropical cyclone and hurricane risk
Very Low
Higher than 34% of US counties
Risk Overview
About Natural Disaster Risk in Marion County, Indiana
Marion County faces significantly above-average risk
Marion County's composite risk score of 97.49 ranks it in the high-risk category, more than double Indiana's state average of 45.52. This elevated rating reflects substantial exposure to multiple hazard types, particularly tornadoes and earthquakes. Nationally, Marion County's profile places it among counties with notably heightened natural disaster vulnerability.
The riskiest county in Indiana
Marion County stands as Indiana's most hazard-exposed county by composite risk score, significantly outpacing all other regions in the state. Its 97.49 score dwarfs the statewide average of 45.52, reflecting concentrated vulnerability across flood, tornado, and earthquake hazards. No other Indiana county faces comparable levels of combined natural disaster risk.
Risk levels vary dramatically nearby
Surrounding counties show dramatically lower risk profiles: Morgan County scores 63.49, Monroe County scores 75.99, and Miami County scores 52.80. Marion County's 97.49 composite risk substantially exceeds all adjacent regions, making it a clear outlier in central Indiana. Residents here face substantially different hazard exposure than those in neighboring areas.
Tornadoes and earthquakes dominate here
Marion County faces extreme tornado risk (99.01) and severe earthquake risk (96.37), each among the highest in the nation for their respective hazards. Flood risk also runs high at 98.28, creating a triple threat that demands serious preparation. These three hazards alone account for the county's status as Indiana's most at-risk region.
Comprehensive coverage is essential
Marion County residents should prioritize comprehensive homeowners insurance including flood coverage, as standard policies exclude both flooding and earthquake damage. Given the county's extreme tornado exposure (99.01), reinforced safe rooms or storm shelters can be life-saving investments. Annual policy reviews and disaster preparedness drills are especially critical in this high-risk environment.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in Marion County
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: Marion County
Risk Verdict
Marion County ranks in the top tier for natural disaster risk nationally, with a composite score at the 97th percentile. Comprehensive household preparedness — including reviewing insurance, maintaining emergency supplies, and knowing evacuation routes — is strongly recommended.
Hazard Breakdown
Tornado risk is Marion County's dominant natural hazard, ranked at the 99th percentile nationally under FEMA's National Risk Index. Flood ranks second at the 98th percentile nationally. Additional tracked hazards include earthquake (96th percentile), hurricane (34th percentile), wildfire (22th percentile).
Preparedness Context
Marion County ranks at the 99th percentile nationally for tornado exposure. Unlike many slow-onset hazards, tornadoes in Marion County can reach full intensity in minutes; a pre-practiced household shelter plan matters far more than stockpiled supplies. Alongside tornado exposure, flood at the 98th percentile nationally means Marion County households face multi-hazard severe-weather seasons that benefit from a single integrated emergency plan covering both threats. Marion County county emergency management typically publishes annual severe-weather preparedness guides tailored to local tornado patterns; households benefit from reviewing these before storm season begins each spring.
Regional Context
Compared to other Indiana counties, Marion County runs 52.0 composite risk points higher than the state mean — reflecting above-average hazard concentration in this area.
Is your household prepared for Marion County's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in Marion County, IN?
What types of natural hazards affect Marion County?
How does Marion County risk compare to the Indiana average?
Is Marion County at risk for tornado?
How is natural disaster risk measured?
Why is Marion 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.