Clark County, OH
FEMA National Risk Index scores, disaster declarations & hazard data
Clark County has experienced 11 federally declared disasters since 1974, most recently Covid-19 in 2020. Its overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Clark County's highest-rated hazards are ice storm, inland flooding, and tornado, with its top risk rated "Relatively High" by FEMA's National Risk Index. Recorded storm events have decreased 59% over the past five years compared to the prior five-year period.
Past disasters & FEMA designations
A federal disaster declaration officially designates a county for FEMA disaster assistance. Clark County has been designated in 11 declarations since 1974, covering 5 disaster types including severe storm (5), biological (2), snowstorm (2).
| Year | Type | Event name |
|---|---|---|
| 2020 | Biological | Covid-19 Pandemic |
| 2020 | Biological | Covid-19 |
| 2012 | Severe Storm | Severe Storms And Straight-Line Winds |
| 2012 | Severe Storm | Severe Storms |
| 2009 | Severe Storm | Severe Wind Storm Associated With Tropical Depression Ike |
| 2005 | Snowstorm | Snow |
| 2005 | Severe Storm | Severe Winter Storms, Flooding, And Mudslides |
| 2005 | Hurricane | Hurricane Katrina Evacuation |
| 2004 | Severe Storm | Severe Storms And Flooding |
| 1978 | Snowstorm | Blizzards & Snowstorms |
Showing the 10 most recent of 11 total declarations since 1974.
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 | 25 | 0 | 0 | — |
| Inland Flooding | Relatively Moderate | 84.2 | 34 | 0 | $64K |
| Coastal Flooding | Not Applicable | — | 0 | 0 | — |
| Earthquake | Relatively Low | 78.8 | — | — | — |
| Heat Wave | Relatively Low | 63.2 | 2 | 0 | — |
| Tornado | Relatively Moderate | 82.3 | 15 | 0 | $2.7M |
| Hurricane | Very Low | 40 | 0 | 0 | — |
| Hail | Relatively Moderate | 82.2 | 15 | 0 | — |
| Strong Wind | Relatively Moderate | 81.5 | 0 | 0 | — |
| Winter Weather | Relatively Moderate | 82 | 0 | 0 | — |
| Ice Storm | Relatively High | 87.4 | — | — | — |
| Cold Wave | Relatively Moderate | 67.1 | — | — | — |
| Lightning | Relatively Moderate | 78.2 | 0 | 0 | — |
| Drought | Relatively Low | 53.4 | 0 | 0 | — |
| Landslide | Very Low | 50.1 | 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
Clark County ranks in the 66th percentile (Moderate) 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 | 66th | Moderate |
| Socioeconomic status | 63rd | Moderate |
| Household characteristics | 84th | High |
| Racial & ethnic minority status | 47th | Low |
| Housing type & transportation | 50th | Moderate |
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 | 4th | Very Low |
| Risk to homes | 4th | Very Low |
| Buildings in direct exposure zone | 34.0% | — |
NOAA tracked 65 weather events in this county over 2016–2025: 46 in 2016–20 vs 19 in 2021–25 (-59% — frequency decreasing).
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 Clark County?
According to the FEMA National Risk Index, the highest-risk hazards in Clark County, Ohio are ice storm, inland flooding, and tornado. The county's overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Has Clark County received federal disaster declarations?
Yes. Clark County has received 11 federal disaster declarations since 1974, including declarations in 2020. The most common disaster type on record is severe storm (5 declarations).
Has Clark County had any FEMA disaster declarations in 2024, 2025, or 2026?
No federal disaster declarations have been recorded for Clark County since the start of 2024. Its most recent declaration on record is Covid-19 in 2020.
How does Clark County's natural hazard risk compare to nearby counties?
Among neighboring counties, Montgomery County, OH has the highest overall natural hazard risk (Relatively Moderate) and Madison County, OH has the lowest (Very Low). Clark County is rated Relatively Low overall.
How is Clark County's composite disaster risk index calculated?
Clark 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. Clark County's composite score of 77 means its overall natural hazard risk is higher than 77% of US counties.