O'Brien County Disaster Risk
O'Brien County, Iowa
FEMA Risk Rating
Very Low
National Percentile
16th
of 3,144 counties
State Rank
#91
of 99 (1 = highest risk)
Flood Risk
19th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Very Low
Higher than 19% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Very Low
Higher than 13% of US counties
Tornado
Tornado and severe thunderstorm risk
Relatively Low
Higher than 49% of US counties
Earthquake
Seismic activity and ground shaking risk
Very Low
Higher than 10% of US counties
Risk Overview
About Natural Disaster Risk in O'Brien County, Iowa
O'Brien County ranks well below average
O'Brien County's composite risk score of 16.41 ranks as Very Low, sitting well below the national average. Your county benefits from geography that limits exposure to major natural disasters.
Among Iowa's safest counties
At 16.41, O'Brien County sits far below Iowa's state average of 39.68. You rank among the state's lowest-risk communities for natural disaster exposure.
Safest in the northwestern region
O'Brien County (16.41) is safer than Osceola County (14.85) and significantly outpaces higher-risk neighbors. Your county's risk level reflects northwestern Iowa's favorable geography for disaster preparedness.
Tornados present primary concern
Tornado risk at 48.73 is O'Brien County's highest hazard, sitting near state average despite your overall low composite score. Flood risk (18.51) remains minimal, while wildfire (12.66) and earthquake (9.76) threats are very limited.
Tornado readiness covers main exposure
With tornado risk at 48.73, ensure your household has access to a safe room, basement shelter, or community tornado plan. Your low overall risk means basic homeowners insurance with standard wind coverage provides solid protection for most scenarios.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in O'Brien County
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: O'Brien County
Risk Verdict
O'Brien County's overall natural disaster score at the 16th percentile puts it well below the national median for hazard exposure. O'Brien County residents can take confidence from a 16th percentile ranking, but even lower-risk counties benefit from a practiced household communication plan and awareness of the specific hazards listed above.
Hazard Breakdown
Tornado risk is O'Brien County's dominant natural hazard, ranked at the 49th percentile nationally under FEMA's National Risk Index. Flood ranks second at the 19th percentile nationally. Additional tracked hazards include wildfire (13th percentile), earthquake (10th percentile).
Preparedness Context
With tornado ranked at the 49th percentile nationally, O'Brien County sits in a high-exposure zone where the difference between outcomes often comes down to proximity to a reinforced interior shelter and seconds of warning time. Alongside tornado exposure, flood at the 19th percentile nationally means O'Brien County households face multi-hazard severe-weather seasons that benefit from a single integrated emergency plan covering both threats. For O'Brien County households, safe rooms certified to FEMA 320/361 standards offer the highest protection during a direct tornado hit; households without a safe room should locate the innermost lowest-floor room in their building and practice the route to it before storm season.
Regional Context
O'Brien County's composite risk score sits 23.3 points below the Iowa county average, reflecting a more favorable hazard environment than the state typical.
Is your household prepared for O'Brien County's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in O'Brien County, IA?
What types of natural hazards affect O'Brien County?
How does O'Brien County risk compare to the Iowa average?
Is O'Brien County at risk for tornado?
How is natural disaster risk measured?
Is O'Brien County a safe place to live?
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.