Natural disaster risk in Dewey County, Oklahoma
Oklahoma · population 4,466 · FIPS 40043
Overall: very low risk
Dewey County has a composite risk score of 15.6 out of 100 — higher than 15% of US counties. It ranks 74 of 77 in Oklahoma (1 = highest risk). Its highest-rated hazards are ice storm, drought, wildfire.
Drought now: Yes: D4 Exceptional Drought, 13 weeks
Yes. On the U.S. Drought Monitor map valid 13 October 2026, 100% of Dewey County is in D4 Exceptional Drought. Some of it has been at D4 for 13 weeks in a row.
Drought in Dewey County: the last 52 weeks · droughtmonitor.unl.edu
The U.S. Drought Monitor is jointly produced by the National Drought Mitigation Center at the University of Nebraska-Lincoln, the United States Department of Agriculture, the National Oceanic and Atmospheric Administration and the National Aeronautics and Space Administration. Map courtesy of NDMC.
Risk, loss, vulnerability and resilience
| Measure | Rating and score |
|---|---|
| Overall risk Expected annual loss, adjusted for social vulnerability and community resilience. |
Very low 15.6 |
| Expected annual loss About $5.8 million a year, on average, across all 18 hazards. |
Very low 16.3 |
| Social vulnerability Higher means people may find it harder to prepare and recover. |
Relatively moderate 46.9 |
| Community resilience Higher means a stronger ability to prepare, adapt and recover. |
Relatively moderate 48.7 |
Risk by hazard
FEMA's risk rating for each of 18 natural hazards in Dewey County, highest first. "Not applicable" means the hazard is not modelled here.
| Hazard | Risk rating and score |
|---|---|
| Ice storm | Relatively high 94 |
| Drought | Relatively moderate 86 |
| Wildfire | Relatively low 73 |
| Strong wind | Relatively low 43 |
| Hail | Relatively low 39 |
| Tornado | Relatively low 39 |
| Cold wave | Relatively low 38 |
| Winter weather | Relatively low 25 |
| Landslide | Very low 54 |
| Heat wave | Very low 26 |
| Earthquake | Very low 23 |
| Hurricane | Very low 11 |
| Inland (riverine) flooding | Very low 5 |
| Lightning | Very low 1 |
| Avalanche | Not applicable |
| Coastal flooding | Not applicable |
| Tsunami | Not applicable |
| Volcanic activity | Not applicable |
FEMA disaster declarations for Dewey County
Federal declarations that designated Dewey County, since 1 Jan 2024 (the period this site keeps from OpenFEMA). Older declarations are in FEMA's own dataset.
Yes. Dewey County has been named in 2 FEMA declarations since 1 Jan 2024. The latest is FM-5628-OK (Jumping Juniper Fire), declared 22 Mar 2026.
| Declaration | Kind | Incident | Declared | Individual assistance here |
|---|---|---|---|---|
| FM-5628-OK | Fire management | Jumping Juniper Fire | 22 Mar 2026 | No |
| FM-5557-OK | Fire management | 840 Road Fire | 14 Mar 2025 | No |
All FEMA declarations in Oklahoma, with estimated apply-by dates · Open FEMA deadlines
This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s). Dataset: Disaster Declarations Summaries - v2.
How to read these ratings
- Ratings run in five steps: very low, relatively low, relatively moderate, relatively high and very high. They compare a county with every other US county; they are not a measure of danger on their own.
- Scores run from 0 to 100 and are national percentiles. The bar shows the score: a score of 80 means a higher value than 80% of US counties.
- Overall risk combines the expected annual loss with social vulnerability and community resilience.
- Expected annual loss is the average yearly loss to buildings, people and agriculture the model expects from all 18 hazards.
- Social vulnerability describes how hard it may be for people to prepare for and recover from a disaster. Higher is worse.
- Community resilience describes a community's ability to prepare, adapt and recover. Higher is better.
- "Not applicable" means FEMA does not model that hazard there (for example, hurricanes far inland).
About this data
Source: FEMA National Risk Index, version 1.20, released December 2025, published by the Federal Emergency Management Agency (US public domain). About the National Risk Index. The index is a model of relative risk built from historical hazard records, what is exposed and community factors. It is not a forecast, it does not describe any single property, and it is not insurance or financial advice. For decisions about a specific address, check FEMA's flood maps and your local emergency management office.
Questions
What is the natural disaster risk in Dewey County, Oklahoma?
FEMA's National Risk Index rates the overall risk in Dewey County as very low, with a score of 15.6 out of 100 (higher than 15% of US counties). That is a comparison with other US counties, not a forecast.
What are the biggest natural hazards in Dewey County?
The hazards rated highest for Dewey County are ice storm (relatively high), drought (relatively moderate), wildfire (relatively low).
What is the flood risk in Dewey County?
FEMA rates inland (river and rain) flooding risk in Dewey County as very low. For a specific property, check the FEMA flood map and your local floodplain office.
Has Dewey County had a FEMA disaster declaration?
Yes. Dewey County has been named in 2 FEMA declarations since 1 Jan 2024. The latest is FM-5628-OK (Jumping Juniper Fire), declared 22 Mar 2026.
Is Dewey County in a drought?
Yes. On the U.S. Drought Monitor map valid 13 October 2026, 100% of Dewey County is in D4 Exceptional Drought. Some of it has been at D4 for 13 weeks in a row.
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