Williams County, OH
FEMA National Risk Index scores, disaster declarations & hazard data
Williams County has experienced 8 federally declared disasters since 1978, most recently Covid-19 in 2020. Its overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Williams County's highest-rated hazards are strong wind, tornado, and hail, with its top risk rated "Relatively Moderate" by FEMA's National Risk Index. Community vulnerability is relatively low (18th percentile nationally), indicating stronger recovery capacity than most US counties.
Past disasters & FEMA designations
A federal disaster declaration officially designates a county for FEMA disaster assistance. Williams County has been designated in 8 declarations since 1978, covering 5 disaster types including biological (2), severe storm (2), flood (2).
| Year | Type | Event name |
|---|---|---|
| 2020 | Biological | Covid-19 Pandemic |
| 2020 | Biological | Covid-19 |
| 2012 | Severe Storm | Severe Storms |
| 2005 | Hurricane | Hurricane Katrina Evacuation |
| 2004 | Severe Storm | Severe Storms And Flooding |
| 1996 | Flood | Flooding |
| 1982 | Flood | Severe Storms & Flooding |
| 1978 | Snowstorm | Blizzards & Snowstorms |
Source: FEMA OpenFEMA Disaster Declarations Summaries. A single disaster can produce more than one record per county. Data current through September 2026.
Risk by hazard type
| Hazard | Risk rating | Risk score | Recorded events | Deaths | Prop. damage |
|---|---|---|---|---|---|
| Wildfire | Very Low | 12.1 | 0 | 0 | — |
| Inland Flooding | Relatively Low | 51.8 | 0 | 0 | — |
| Coastal Flooding | Not Applicable | — | 0 | 0 | — |
| Earthquake | Relatively Low | 63 | — | — | — |
| Heat Wave | Very Low | 33.8 | 0 | 0 | — |
| Tornado | Relatively Moderate | 74.4 | 0 | 0 | — |
| Hurricane | Very Low | 31.9 | 0 | 0 | — |
| Hail | Relatively Moderate | 73.6 | 13 | 0 | $1K |
| Strong Wind | Relatively Moderate | 80.2 | 0 | 0 | — |
| Winter Weather | Relatively Low | 38.1 | 0 | 0 | — |
| Ice Storm | Relatively Moderate | 62.8 | — | — | — |
| Cold Wave | Relatively Low | 47.4 | — | — | — |
| Lightning | Relatively Low | 44.4 | 0 | 0 | — |
| Drought | Relatively Low | 45.2 | 0 | 0 | — |
| Landslide | Very Low | 41.7 | 0 | 0 | — |
| Avalanche | Not Applicable | — | — | — | — |
| Tsunami | Not Applicable | — | — | — | — |
| Volcanic Activity | Not Applicable | — | — | — | — |
Scores are 0–100 percentiles relative to all US counties — higher means more exposed, not that a disaster is likely this year. Event counts: NOAA Storm Events 2016–2026; earthquake counts from USGS ComCat (M3.0+, 1996–2026). See the methodology page for details.
Community vulnerability
Williams County ranks in the 18th percentile (Very low) for community vulnerability — a measure of how hard disaster impacts tend to hit residents. Higher vulnerability means more displacement, worse health outcomes, and slower recovery after a disaster.
| SVI theme | Percentile | Vulnerability level |
|---|---|---|
| Overall | 18th | Very low |
| Socioeconomic status | 19th | Very low |
| Household characteristics | 46th | Low |
| Racial & ethnic minority status | 23rd | Very low |
| Housing type & transportation | 16th | Very low |
Source: CDC/ATSDR Social Vulnerability Index 2022. Percentiles compare counties nationally — higher means more vulnerable relative to other counties. See CDC SVI for full methodology.
Future risk outlook
| Wildfire metric | National percentile | Level |
|---|---|---|
| Burn probability | 2nd | Very Low |
| Risk to homes | 2nd | Very Low |
| Buildings in direct exposure zone | 31.2% | — |
Wildfire: USDA Forest Service Wildfire Risk to Communities (RDS-2020-0016-2) — modeled values, not annual forecasts. See wildfirerisk.org. Inland flood and heat projections pending data availability; coastal sea-level projections are available for select coastal counties below — see the data page.
Nearby counties
Frequently asked questions
What natural hazards pose the greatest risk in Williams County?
According to the FEMA National Risk Index, the highest-risk hazards in Williams County, Ohio are strong wind, tornado, and hail. The county's overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Has Williams County received federal disaster declarations?
Yes. Williams County has received 8 federal disaster declarations since 1978, including declarations in 2020. The most common disaster type on record is biological (2 declarations).
Has Williams County had any FEMA disaster declarations in 2024, 2025, or 2026?
No federal disaster declarations have been recorded for Williams County since the start of 2024. Its most recent declaration on record is Covid-19 in 2020.
How does Williams County's natural hazard risk compare to nearby counties?
Among neighboring counties, Hillsdale County, MI has the highest overall natural hazard risk (Relatively Low) and Paulding County, OH has the lowest (Very Low). Williams County is rated Relatively Low overall.
How is Williams County's composite disaster risk index calculated?
Williams County's composite disaster risk index — officially FEMA's National Risk Index (NRI) — scores every US county on a 0–100 percentile scale across 18 natural hazard types, factoring in expected annual loss, social vulnerability, and community resilience. Williams County's composite score of 44 means its overall natural hazard risk is higher than 44% of US counties.