Natural disaster risk in Deuel County, South Dakota
South Dakota · population 4,285 · FIPS 46039
Overall: very low risk
Deuel County has a composite risk score of 6.9 out of 100 — higher than 6% of US counties. It ranks 53 of 66 in South Dakota (1 = highest risk). Its highest-rated hazards are ice storm, wildfire, winter weather.
Drought now: Yes: D1 Moderate Drought, 29 weeks
Yes. On the U.S. Drought Monitor map valid 13 October 2026, 33.5% of Deuel County is in D1 Moderate Drought. Some of it has been at D1 or worse for 29 weeks in a row.
Drought in Deuel 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 6.9 |
| Expected annual loss About $5.5 million a year, on average, across all 18 hazards. |
Very low 15 |
| Social vulnerability Higher means people may find it harder to prepare and recover. |
Very low 10.6 |
| Community resilience Higher means a stronger ability to prepare, adapt and recover. |
Relatively high 70.1 |
Risk by hazard
FEMA's risk rating for each of 18 natural hazards in Deuel County, highest first. "Not applicable" means the hazard is not modelled here.
| Hazard | Risk rating and score |
|---|---|
| Ice storm | Relatively moderate 64 |
| Wildfire | Relatively low 69 |
| Winter weather | Relatively low 53 |
| Hail | Relatively low 49 |
| Cold wave | Relatively low 46 |
| Drought | Relatively low 38 |
| Tornado | Relatively low 32 |
| Strong wind | Relatively low 17 |
| Landslide | Very low 33 |
| Heat wave | Very low 30 |
| Inland (riverine) flooding | Very low 9 |
| Earthquake | Very low 6 |
| Lightning | Very low 1 |
| Avalanche | Not applicable |
| Coastal flooding | Not applicable |
| Hurricane | Not applicable |
| Tsunami | Not applicable |
| Volcanic activity | Not applicable |
FEMA disaster declarations for Deuel County
Federal declarations that designated Deuel County, since 1 Jan 2024 (the period this site keeps from OpenFEMA). Older declarations are in FEMA's own dataset.
Not since 1 Jan 2024: no FEMA disaster declaration in the records this site read names Deuel County.
All FEMA declarations in South Dakota, 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 Deuel County, South Dakota?
FEMA's National Risk Index rates the overall risk in Deuel County as very low, with a score of 6.9 out of 100 (higher than 6% of US counties). That is a comparison with other US counties, not a forecast.
What are the biggest natural hazards in Deuel County?
The hazards rated highest for Deuel County are ice storm (relatively moderate), wildfire (relatively low), winter weather (relatively low).
What is the flood risk in Deuel County?
FEMA rates inland (river and rain) flooding risk in Deuel County as very low. For a specific property, check the FEMA flood map and your local floodplain office.
Has Deuel County had a FEMA disaster declaration?
Not since 1 Jan 2024: no FEMA disaster declaration in the records this site read names Deuel County.
Is Deuel County in a drought?
Yes. On the U.S. Drought Monitor map valid 13 October 2026, 33.5% of Deuel County is in D1 Moderate Drought. Some of it has been at D1 or worse for 29 weeks in a row.
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