Union, MO
Local storm history & FEMA National Risk Index data
Union 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 Franklin County, MO. The county's highest-rated hazards are strong wind, heat wave, and earthquake.
Storm events near Union
NOAA-recorded tornado, hail, and flood events within 25 miles of Union's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Union 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 Franklin County's FEMA National Risk Index scores, covering Union along with the rest of the county, not a Union-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 66.7 | Relatively Low |
| Inland Flooding | 85.4 | Relatively Moderate |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 89.9 | Relatively Low |
| Heat Wave | 93.7 | Relatively Moderate |
| Tornado | 86.5 | Relatively Moderate |
| Avalanche | — | Not Applicable |
| Cold Wave | 75.3 | Relatively Moderate |
| Drought | 30.1 | Very Low |
| Hail | 88.7 | Relatively Moderate |
| Hurricane | 18.3 | Very Low |
| Ice Storm | 78.9 | Relatively Moderate |
| Landslide | 88.1 | Relatively Moderate |
| Lightning | 68.4 | Relatively Moderate |
| Strong Wind | 93.9 | Relatively High |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 68 | Relatively Moderate |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Franklin County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Franklin County:
More on Franklin County:
Frequently asked questions
What natural hazards is Union, MO at risk of?
Union 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 Franklin County, where Union is located, are strong wind, heat wave, and earthquake.
What is Union's biggest natural hazard risk?
Strong Wind is the highest-rated hazard for Franklin County, where Union is located, scoring 93.9 out of 100 on FEMA's National Risk Index (rated "Relatively High").
Is Union a high-risk area for natural disasters?
Somewhat — Union 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 Franklin County.
Has Union had tornadoes, hail, or flooding?
NOAA has recorded 23 tornado, 119 hail, 34 inland flooding events within 25 miles of Union since 2016.