Sioux County
Nebraska — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 1th
Sioux County faces very low composite natural disaster risk (NRI Risk Index score 1.4, 1th national percentile), driven primarily by drought and wildfire exposure. Expected annual loss across all 18 hazard types is $2M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Drought | Medium | 96.44 / yr | $670K |
| Wildfire | Low | 0.00 / yr | $216K |
| Hail | Very Low | 4.25 / yr | $163K |
| Winter Weather | Very Low | 16.69 / yr | $24K |
| Landslide | Very Low | 0.90 / yr | $171 |
| Cold Wave | Very Low | 5.62 / yr | $282K |
| Tornado | Very Low | 0.86 / yr | $107K |
| Earthquake | Very Low | 0.00 / yr | $11K |
| Ice Storm | Very Low | 0.02 / yr | $3K |
| Lightning | Very Low | 44.59 / yr | $17K |
| Heat Wave | Very Low | 0.74 / yr | $3K |
| Strong Wind | Very Low | 1.18 / yr | $20K |
| Riverine Flood | Very Low | 0.21 / yr | $423K |
| 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 Sioux County?
Sioux County has a composite FEMA National Risk Index score of 1.4 out of 100, placing it in the Very Low category and the 1th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Sioux County?
The three highest-rated hazards are Drought (Medium, $670K EAL), Wildfire (Low, $216K EAL), Hail (Very Low, $163K EAL). These account for most of the county's expected annual losses.
How does Sioux County compare to other Nebraska counties?
Sioux County ranks #81 of 93 Nebraska 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. Sioux County's $2M EAL is a statistical average, not a guarantee for any specific year or address.