Sioux Falls, SD
Local storm history & FEMA National Risk Index data
Sioux Falls is rated Relatively Moderate for overall natural hazard risk — near the middle compared to other US counties — based on FEMA's National Risk Index for Minnehaha County, SD. The county's highest-rated hazards are ice storm, tornado, and winter weather.
Storm events near Sioux Falls
NOAA-recorded tornado, hail, and flood events within 25 miles of Sioux Falls's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Sioux Falls 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 Minnehaha County's FEMA National Risk Index scores, covering Sioux Falls along with the rest of the county, not a Sioux Falls-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 71.3 | Relatively Low |
| Inland Flooding | 85.5 | Relatively Moderate |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 37.2 | Very Low |
| Heat Wave | 87.2 | Relatively Moderate |
| Tornado | 98.4 | Relatively High |
| Avalanche | — | Not Applicable |
| Cold Wave | 96 | Relatively High |
| Drought | 73.4 | Relatively Moderate |
| Hail | 92.5 | Relatively Moderate |
| Hurricane | — | Not Applicable |
| Ice Storm | 99.1 | Very High |
| Landslide | 52.2 | Very Low |
| Lightning | 55.1 | Relatively Low |
| Strong Wind | 91.1 | Relatively High |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 96.3 | Relatively High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Minnehaha County risk profile for disaster declarations, social vulnerability, and climate projection data.
More on Minnehaha County:
Frequently asked questions
What natural hazards is Sioux Falls, SD at risk of?
Sioux Falls is rated Relatively Moderate for overall natural hazard risk by FEMA's National Risk Index — near the middle compared to other US counties. The highest-rated hazards for Minnehaha County, where Sioux Falls is located, are ice storm, tornado, and winter weather.
What is Sioux Falls's biggest natural hazard risk?
Ice Storm is the highest-rated hazard for Minnehaha County, where Sioux Falls is located, scoring 99.1 out of 100 on FEMA's National Risk Index (rated "Very High").
Is Sioux Falls a high-risk area for natural disasters?
Somewhat — Sioux Falls carries near the middle compared to other US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively Moderate" for Minnehaha County.
Has Sioux Falls had tornadoes, hail, or flooding?
NOAA has recorded 18 tornado, 180 hail, 334 inland flooding events within 25 miles of Sioux Falls since 2016.