Marietta, OH
Local storm history & FEMA National Risk Index data
Marietta is rated Relatively Low for overall natural hazard risk — lower risk than most US counties — based on FEMA's National Risk Index for Washington County, OH. The county's highest-rated hazards are landslide, inland flooding, and ice storm.
Storm events near Marietta
NOAA-recorded tornado, hail, and flood events within 25 miles of Marietta's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Marietta 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 Washington County's FEMA National Risk Index scores, covering Marietta along with the rest of the county, not a Marietta-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 22.6 | Very Low |
| Inland Flooding | 80.5 | Relatively Moderate |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 47.1 | Very Low |
| Heat Wave | 64.5 | Relatively Low |
| Tornado | 33.1 | Relatively Low |
| Avalanche | — | Not Applicable |
| Cold Wave | 16.6 | Very Low |
| Drought | 61.9 | Relatively Low |
| Hail | 57.3 | Relatively Low |
| Hurricane | 57.4 | Very Low |
| Ice Storm | 73 | Relatively Moderate |
| Landslide | 88.3 | Relatively Moderate |
| Lightning | 63.7 | Relatively Moderate |
| Strong Wind | 51.2 | Relatively Low |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 23.5 | Very Low |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Washington County risk profile for disaster declarations, social vulnerability, and climate projection data.
More on Washington County:
Frequently asked questions
What natural hazards is Marietta, OH at risk of?
Marietta 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 Washington County, where Marietta is located, are landslide, inland flooding, and ice storm.
What is Marietta's biggest natural hazard risk?
Landslide is the highest-rated hazard for Washington County, where Marietta is located, scoring 88.3 out of 100 on FEMA's National Risk Index (rated "Relatively Moderate").
Is Marietta a high-risk area for natural disasters?
No — Marietta carries lower risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively Low" for Washington County.
Has Marietta had tornadoes, hail, or flooding?
NOAA has recorded 2 tornado, 76 hail, 312 inland flooding events within 25 miles of Marietta since 2016.