Edmunds County
South Dakota — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 7th
Edmunds County faces very low composite natural disaster risk (NRI Risk Index score 7.0, 7th national percentile), driven primarily by winter weather and wildfire exposure. Expected annual loss across all 18 hazard types is $5M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Winter Weather | Medium | 19.11 / yr | $231K |
| Wildfire | Low | 0.00 / yr | $236K |
| Hail | Low | 3.71 / yr | $484K |
| Cold Wave | Low | 11.95 / yr | $2M |
| Ice Storm | Low | 0.51 / yr | $127K |
| Drought | Low | 8.95 / yr | $178K |
| Strong Wind | Low | 2.50 / yr | $320K |
| Tornado | Very Low | 0.46 / yr | $445K |
| Heat Wave | Very Low | 3.21 / yr | $37K |
| Earthquake | Very Low | 0.00 / yr | $17K |
| Riverine Flood | Very Low | 1.00 / yr | $2M |
| Lightning | Very Low | 31.59 / yr | $23K |
| Landslide | Very Low | 0.11 / yr | $6 |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Hurricane | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Edmunds County?
Edmunds County has a composite FEMA National Risk Index score of 7.0 out of 100, placing it in the Very Low category and the 7th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Edmunds County?
The three highest-rated hazards are Winter Weather (Medium, $231K EAL), Wildfire (Low, $236K EAL), Hail (Low, $484K EAL). These account for most of the county's expected annual losses.
How does Edmunds County compare to other South Dakota counties?
Edmunds County ranks #52 of 66 South Dakota counties for overall natural disaster risk, with a very low rating.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. Edmunds County's $5M EAL is a statistical average, not a guarantee for any specific year or address.