Mason, OH
Local storm history & FEMA National Risk Index data
Mason is rated Relatively Low for overall natural hazard risk — lower risk than most US counties — based on FEMA's National Risk Index for Warren County, OH. The county's highest-rated hazards are ice storm, inland flooding, and tornado.
Storm events near Mason
NOAA-recorded tornado, hail, and flood events within 25 miles of Mason's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Mason 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 Warren County's FEMA National Risk Index scores, covering Mason along with the rest of the county, not a Mason-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 37.7 | Very Low |
| Inland Flooding | 83.9 | Relatively Moderate |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 75.5 | Relatively Low |
| Heat Wave | 65.8 | Relatively Low |
| Tornado | 83.4 | Relatively Moderate |
| Avalanche | — | Not Applicable |
| Cold Wave | 81.6 | Relatively Moderate |
| Drought | 47.5 | Relatively Low |
| Hail | 57.8 | Relatively Low |
| Hurricane | 21.3 | Very Low |
| Ice Storm | 88 | Relatively High |
| Landslide | 67.3 | Relatively Low |
| Lightning | 83.4 | Relatively High |
| Strong Wind | 76.1 | Relatively Moderate |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 78.9 | Relatively Moderate |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Warren County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Warren County:
More on Warren County:
Frequently asked questions
What natural hazards is Mason, OH at risk of?
Mason is rated Relatively Low for overall natural hazard risk by FEMA's National Risk Index — lower risk than most US counties. The highest-rated hazards for Warren County, where Mason is located, are ice storm, inland flooding, and tornado.
What is Mason's biggest natural hazard risk?
Ice Storm is the highest-rated hazard for Warren County, where Mason is located, scoring 88 out of 100 on FEMA's National Risk Index (rated "Relatively High").
Is Mason a high-risk area for natural disasters?
No — Mason carries lower risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively Low" for Warren County.
Has Mason had tornadoes, hail, or flooding?
NOAA has recorded 41 tornado, 184 hail, 357 inland flooding events within 25 miles of Mason since 2016.