Minnehaha County Disaster Risk
Minnehaha County, South Dakota
FEMA Risk Rating
Relatively Moderate
National Percentile
90th
of 3,144 counties
State Rank
#1
of 66 (1 = highest risk)
Flood Risk
85th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Moderate
Higher than 85% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Relatively Low
Higher than 71% of US counties
Tornado
Tornado and severe thunderstorm risk
Relatively High
Higher than 98% of US counties
Earthquake
Seismic activity and ground shaking risk
Very Low
Higher than 37% of US counties
Risk Overview
About Natural Disaster Risk in Minnehaha County, South Dakota
Minnehaha faces above-average disaster risk
Minnehaha County scores 89.54 on the national composite risk scale, placing it in the relatively moderate risk category—well above South Dakota's county average of 26.84. The county's overall hazard exposure significantly exceeds what most U.S. counties experience, driven primarily by severe tornado and flood risks that demand serious preparedness attention.
Highest-risk county in South Dakota
Among South Dakota's 66 counties, Minnehaha ranks as the state's most dangerous for natural disasters, with a composite risk score nearly 3.4 times the state average. This distinction reflects concentrated exposure to multiple hazard types, particularly tornadoes and flooding, that routinely impact the county.
Far riskier than neighboring Moody County
Minnehaha's composite risk of 89.54 dwarfs neighboring Moody County's score of 26.94—a threefold difference that makes Minnehaha one of the state's most hazard-prone regions. The contrast underscores how disaster risk varies sharply across short distances in South Dakota's eastern corridor.
Tornadoes and floods dominate your hazard profile
Tornado risk in Minnehaha reaches 98.38, representing one of the highest scores in the nation and the county's most immediate threat. Flooding also presents substantial danger at 85.50, meaning residents face dual exposure to both severe convective storms and water hazards that can occur within hours of each other.
Secure comprehensive coverage now
Given Minnehaha's exceptional tornado and flood risks, homeowners should carry both comprehensive homeowners insurance and a separate flood policy, as standard policies exclude flood damage. Consider a safe room or reinforced shelter for tornado season, and maintain quarterly review of coverage limits to match current property values.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in Minnehaha County
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: Minnehaha County
Risk Verdict
At the 90th percentile nationally, Minnehaha County sits in the upper half of U.S. counties for natural disaster exposure. At this risk level, having a documented household preparedness plan — not just awareness — is the meaningful next step for Minnehaha County residents.
Hazard Breakdown
Tornado risk is Minnehaha County's dominant natural hazard, ranked at the 98th percentile nationally under FEMA's National Risk Index. Flood ranks second at the 85th percentile nationally. Additional tracked hazards include wildfire (71th percentile), earthquake (37th percentile).
Preparedness Context
Tornado exposure at the 98th percentile nationally makes Minnehaha County a county where a battery-powered weather radio — not just smartphone apps — is a worthwhile household investment, given that mobile networks often fail during severe storms. Alongside tornado exposure, flood at the 85th percentile nationally means Minnehaha County households face multi-hazard severe-weather seasons that benefit from a single integrated emergency plan covering both threats. In Minnehaha County, tornado watches indicate favorable atmospheric conditions while warnings mean rotation has been detected — households benefit from understanding this distinction so they shelter immediately on a warning, not after seeking visual confirmation.
Regional Context
The South Dakota county average is 62.7 composite points below Minnehaha County's score, a gap that reflects the county's elevated position in the state's hazard distribution.
Is your household prepared for Minnehaha County's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in Minnehaha County, SD?
What types of natural hazards affect Minnehaha County?
How does Minnehaha County risk compare to the South Dakota average?
Is Minnehaha County at risk for tornado?
How is natural disaster risk measured?
Why is Minnehaha 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.