South Sioux City, NE
Local storm history & FEMA National Risk Index data
South Sioux City is rated Very Low for overall natural hazard risk — among the lowest-risk counties in the country — based on FEMA's National Risk Index for Dakota County, NE. The county's highest-rated hazards are hail, wildfire, and tornado.
Storm events near South Sioux City
NOAA-recorded tornado, hail, and flood events within 25 miles of South Sioux City's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to South Sioux City itself, not the whole county.
County-wide hazard risk
Every other hazard FEMA and NOAA track — including drought — is only scored at the county level. These are Dakota County's FEMA National Risk Index scores, covering South Sioux City along with the rest of the county, not a South Sioux City-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 78.1 | Relatively Low |
| Inland Flooding | 33.8 | Very Low |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 14.6 | Very Low |
| Heat Wave | 60.2 | Relatively Low |
| Tornado | 75.6 | Relatively Moderate |
| Avalanche | — | Not Applicable |
| Cold Wave | 29 | Relatively Low |
| Drought | 74.5 | Relatively Moderate |
| Hail | 87 | Relatively Moderate |
| Hurricane | — | Not Applicable |
| Ice Storm | 64.7 | Relatively Moderate |
| Landslide | 74 | Relatively Low |
| Lightning | 25.3 | Relatively Low |
| Strong Wind | 50.4 | Relatively Low |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 51.2 | Relatively Low |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Dakota County risk profile for disaster declarations, social vulnerability, and climate projection data.
More on Dakota County:
Frequently asked questions
What natural hazards is South Sioux City, NE at risk of?
South Sioux City is rated Very Low for overall natural hazard risk by FEMA's National Risk Index — among the lowest-risk counties in the country. The highest-rated hazards for Dakota County, where South Sioux City is located, are hail, wildfire, and tornado.
What is South Sioux City's biggest natural hazard risk?
Hail is the highest-rated hazard for Dakota County, where South Sioux City is located, scoring 87 out of 100 on FEMA's National Risk Index (rated "Relatively Moderate").
Is South Sioux City a high-risk area for natural disasters?
No — South Sioux City carries among the lowest-risk counties in the country for overall natural hazard risk, per FEMA's National Risk Index rating of "Very Low" for Dakota County.
Has South Sioux City had tornadoes, hail, or flooding?
NOAA has recorded 9 tornado, 116 hail, 147 inland flooding events within 25 miles of South Sioux City since 2016.