Dallas County Disaster Risk
Dallas County, Iowa
FEMA Risk Rating
Relatively Low
National Percentile
61th
of 3,144 counties
State Rank
#16
of 99 (1 = highest risk)
Flood Risk
60th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Relatively Low
Higher than 60% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Very Low
Higher than 41% of US counties
Tornado
Tornado and severe thunderstorm risk
Moderate
Higher than 85% of US counties
Earthquake
Seismic activity and ground shaking risk
Very Low
Higher than 26% of US counties
Hurricane
Tropical cyclone and hurricane risk
Very Low
Higher than 13% of US counties
Risk Overview
About Natural Disaster Risk in Dallas County, Iowa
Dallas County's Risk Above National Average
Dallas County scores 60.59 on the composite risk scale, placing it in the "Relatively Low" category but notably higher than Iowa's state average of 39.68. This elevation reflects concentrated tornado exposure and moderate flood risk that outpace much of the Midwest. Understanding your local hazards is the first step toward effective preparation.
Middle of the Pack in Iowa Risk Rankings
Among Iowa's 99 counties, Dallas County ranks in the upper-middle tier for overall disaster risk, driven primarily by its 84.70 tornado risk score—one of the state's highest. While flood and wildfire risks remain moderate, the tornado threat distinguishes Dallas as a county where severe weather preparedness matters most. This positioning reflects Dallas's geography and history with spring and summer storm activity.
Higher Risk Than Surrounding Counties
Dallas County's 60.59 composite score exceeds neighboring Polk, Madison, and Warren counties, primarily due to elevated tornado exposure. Decatur County to the south scores significantly lower at 23.60, representing Iowa's lowest-risk profile. Dallas residents face notably steeper natural disaster risks than their immediate neighbors across most hazard types.
Tornadoes and Flooding Lead Your Threats
Tornado risk dominates Dallas County at 84.70—a level that warrants a reliable weather alert system and a designated safe room in your home. Flood risk scores 60.43, reflecting the county's drainage patterns and proximity to Des Moines River tributaries, making flood insurance essential for properties in low-lying areas. Wildfire risk at 40.65 remains manageable but worth monitoring during drought conditions.
Prepare for Tornadoes and Floods Now
Given Dallas County's extreme tornado exposure, ensure your homeowner's policy covers storm damage and consider installing a safe room or basement shelter. Flood insurance through the National Flood Insurance Program (NFIP) is critical if you're in a flood-prone zone—standard homeowner's policies exclude flood damage. Review your coverage annually and sign up for local emergency alerts through your county emergency management office.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in Dallas County
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: Dallas County
Risk Verdict
Dallas County ranks at the 61th percentile nationally for natural disaster risk — below the median for U.S. counties. Residents are encouraged to understand which hazards dominate locally and tailor their preparedness accordingly.
Hazard Breakdown
Tornado risk is Dallas County's dominant natural hazard, ranked at the 85th percentile nationally under FEMA's National Risk Index. Flood ranks second at the 60th percentile nationally. Additional tracked hazards include wildfire (41th percentile), earthquake (26th percentile), hurricane (13th percentile).
Preparedness Context
Dallas County ranks at the 85th percentile nationally for tornado exposure. Unlike many slow-onset hazards, tornadoes in Dallas County can reach full intensity in minutes; a pre-practiced household shelter plan matters far more than stockpiled supplies. Flood is the second hazard driver for Dallas County at the 60th percentile nationally, meaning households should maintain awareness of both severe-weather and flood-specific warning systems. Dallas 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 Iowa counties, Dallas County runs 20.9 composite risk points higher than the state mean — reflecting above-average hazard concentration in this area.
Is your household prepared for Dallas County's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in Dallas County, IA?
What types of natural hazards affect Dallas County?
How does Dallas County risk compare to the Iowa average?
Is Dallas County at risk for tornado?
How is natural disaster risk measured?
Why is Dallas 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.