Washington County, MO
FEMA National Risk Index scores, disaster declarations & hazard data
Washington County has experienced 27 federally declared disasters since 1973, most recently Severe Storms, Tornadoes, Straight-Line Winds, And Flooding in 2025. Its overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Washington County's highest-rated hazards are heat wave, cold wave, and earthquake, with its top risk rated "Relatively Moderate" by FEMA's National Risk Index. NOAA records 39 storm events in the county over the past decade. Community vulnerability is elevated (80th percentile nationally), suggesting residents may face greater difficulty recovering from major disasters.
Past disasters & FEMA designations
A federal disaster declaration officially designates a county for FEMA disaster assistance. Washington County has been designated in 27 declarations since 1973, covering 6 disaster types including severe storm (16), flood (5), biological (2).
| Year | Type | Event name |
|---|---|---|
| 2025 | Severe Storm | Severe Storms, Tornadoes, Straight-Line Winds, And Flooding |
| 2025 | Severe Storm | Severe Storms, Straight-Line Winds, Tornadoes, And Flooding |
| 2025 | Severe Storm | Severe Storms, Straight-Line Winds, Tornadoes, And Flooding |
| 2020 | Biological | Covid-19 Pandemic |
| 2020 | Biological | Covid-19 |
| 2017 | Flood | Severe Storms, Tornadoes, Straight-Line Winds And Flooding |
| 2016 | Flood | Severe Storms, Tornadoes, Straight-Line Winds, And Flooding |
| 2016 | Flood | Severe Storms, Tornadoes, Straight-Line Winds, And Flooding |
| 2015 | Severe Storm | Severe Storms, Tornadoes, Straight-Line Winds, And Flooding |
| 2011 | Severe Storm | Severe Winter Storm |
Showing the 10 most recent of 27 total declarations since 1973.
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 | 56 | 0 | 0 | — |
| Inland Flooding | Relatively Low | 52.6 | 8 | 0 | — |
| Coastal Flooding | Not Applicable | — | 0 | 0 | — |
| Earthquake | Relatively Low | 82.9 | 1 | — | — |
| Heat Wave | Relatively Moderate | 96 | 5 | 0 | — |
| Tornado | Relatively Moderate | 65.2 | 5 | 0 | $735K |
| Hurricane | Very Low | 30.2 | 0 | 0 | — |
| Hail | Relatively Low | 52.4 | 22 | 0 | $15K |
| Strong Wind | Relatively Moderate | 75 | 0 | 0 | — |
| Winter Weather | Relatively Low | 43.8 | 0 | 0 | — |
| Ice Storm | Relatively Low | 58.5 | — | — | — |
| Cold Wave | Relatively Moderate | 88.1 | — | — | — |
| Lightning | Relatively Low | 43.9 | 0 | 0 | — |
| Drought | Very Low | 21 | 0 | 0 | — |
| Landslide | Relatively Low | 79.8 | 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
Washington County ranks in the 80th percentile (High) 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 | 80th | High |
| Socioeconomic status | 81st | High |
| Household characteristics | 73rd | Moderate |
| Racial & ethnic minority status | 21st | Very low |
| Housing type & transportation | 86th | High |
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 | 58th | Relatively Moderate |
| Risk to homes | 55th | Relatively Moderate |
| Buildings in direct exposure zone | 92.1% | — |
NOAA tracked 39 weather events in this county over 2016–2025: 20 in 2016–20 vs 19 in 2021–25 (-5% — relatively stable).
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 Washington County?
According to the FEMA National Risk Index, the highest-risk hazards in Washington County, Missouri are heat wave, cold wave, and earthquake. The county's overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Has Washington County received federal disaster declarations?
Yes. Washington County has received 27 federal disaster declarations since 1973, including declarations in 2025. The most common disaster type on record is severe storm (16 declarations).
Has Washington County had any FEMA disaster declarations in 2024, 2025, or 2026?
Yes. Recent federal disaster declarations for Washington County include Severe Storms, Tornadoes, Straight-Line Winds, And Flooding (2025), Severe Storms, Straight-Line Winds, Tornadoes, And Flooding (2025), Severe Storms, Straight-Line Winds, Tornadoes, And Flooding (2025). See the declarations table above for the full history since 1973.
How does Washington County's natural hazard risk compare to nearby counties?
Among neighboring counties, Jefferson County, MO has the highest overall natural hazard risk (Relatively Moderate) and Dent County, MO has the lowest (Relatively Low). Washington County is rated Relatively Low overall.
How is Washington County's composite disaster risk index calculated?
Washington 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. Washington County's composite score of 68 means its overall natural hazard risk is higher than 68% of US counties.