Oskaloosa, IA
Local storm history & FEMA National Risk Index data
Oskaloosa 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 Mahaska County, IA. The county's highest-rated hazards are drought, strong wind, and hail.
Storm events near Oskaloosa
NOAA-recorded tornado, hail, and flood events within 25 miles of Oskaloosa's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Oskaloosa 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 Mahaska County's FEMA National Risk Index scores, covering Oskaloosa along with the rest of the county, not a Oskaloosa-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 42.4 | Very Low |
| Inland Flooding | 36.4 | Relatively Low |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 29.5 | Very Low |
| Heat Wave | 54.9 | Relatively Low |
| Tornado | 54.6 | Relatively Low |
| Avalanche | — | Not Applicable |
| Cold Wave | 34.7 | Relatively Low |
| Drought | 83.9 | Relatively Moderate |
| Hail | 64.6 | Relatively Low |
| Hurricane | 11.1 | Very Low |
| Ice Storm | 44.5 | Relatively Low |
| Landslide | 58.9 | Very Low |
| Lightning | 35 | Relatively Low |
| Strong Wind | 69.3 | Relatively Moderate |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 46.6 | Relatively Low |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Mahaska County risk profile for disaster declarations, social vulnerability, and climate projection data.
More on Mahaska County:
Frequently asked questions
What natural hazards is Oskaloosa, IA at risk of?
Oskaloosa 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 Mahaska County, where Oskaloosa is located, are drought, strong wind, and hail.
What is Oskaloosa's biggest natural hazard risk?
Drought is the highest-rated hazard for Mahaska County, where Oskaloosa is located, scoring 83.9 out of 100 on FEMA's National Risk Index (rated "Relatively Moderate").
Is Oskaloosa a high-risk area for natural disasters?
No — Oskaloosa 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 Mahaska County.
Has Oskaloosa had tornadoes, hail, or flooding?
NOAA has recorded 22 tornado, 109 hail, 43 inland flooding events within 25 miles of Oskaloosa since 2016.