Natural disaster risk in Washington County, Idaho
Idaho · population 10,478 · FIPS 16087
Overall: very low risk
Washington County has a composite risk score of 30.3 out of 100 — higher than 30% of US counties. It ranks 27 of 44 in Idaho (1 = highest risk). Its highest-rated hazards are wildfire, avalanche, landslide.
Drought now: Yes: D2 Severe Drought, 11 weeks
Yes. On the U.S. Drought Monitor map valid 13 October 2026, 63.59% of Washington County is in D2 Severe Drought. Some of it has been at D2 or worse for 11 weeks in a row. In all, 95.15% of the county is in drought (D1 to D4).
Drought in Washington 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 30.3 |
| Expected annual loss About $7.5 million a year, on average, across all 18 hazards. |
Very low 24 |
| Social vulnerability Higher means people may find it harder to prepare and recover. |
Relatively high 70 |
| Community resilience Higher means a stronger ability to prepare, adapt and recover. |
Very low 7 |
Risk by hazard
FEMA's risk rating for each of 18 natural hazards in Washington County, highest first. "Not applicable" means the hazard is not modelled here.
| Hazard | Risk rating and score |
|---|---|
| Wildfire | Relatively moderate 95 |
| Avalanche | Relatively low 73 |
| Landslide | Relatively low 72 |
| Winter weather | Relatively low 51 |
| Inland (riverine) flooding | Relatively low 38 |
| Strong wind | Relatively low 21 |
| Earthquake | Very low 53 |
| Volcanic activity | Very low 40 |
| Heat wave | Very low 38 |
| Hail | Very low 18 |
| Lightning | Very low 17 |
| Ice storm | Very low 15 |
| Drought | Very low 14 |
| Cold wave | Very low 8 |
| Tornado | Very low 5 |
| Coastal flooding | Not applicable |
| Hurricane | Not applicable |
| Tsunami | Not applicable |
FEMA disaster declarations for Washington County
Federal declarations that designated Washington County, since 1 Jan 2024 (the period this site keeps from OpenFEMA). Older declarations are in FEMA's own dataset.
Yes. Washington County has been named in 1 FEMA declaration since 1 Jan 2024. The latest is FM-5660-ID (Tartar Fire), declared 2 Aug 2026.
| Declaration | Kind | Incident | Declared | Individual assistance here |
|---|---|---|---|---|
| FM-5660-ID | Fire management | Tartar Fire | 2 Aug 2026 | No |
All FEMA declarations in Idaho, 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 Washington County, Idaho?
FEMA's National Risk Index rates the overall risk in Washington County as very low, with a score of 30.3 out of 100 (higher than 30% of US counties). That is a comparison with other US counties, not a forecast.
What are the biggest natural hazards in Washington County?
The hazards rated highest for Washington County are wildfire (relatively moderate), avalanche (relatively low), landslide (relatively low).
What is the flood risk in Washington County?
FEMA rates inland (river and rain) flooding risk in Washington County as relatively low. For a specific property, check the FEMA flood map and your local floodplain office.
Has Washington County had a FEMA disaster declaration?
Yes. Washington County has been named in 1 FEMA declaration since 1 Jan 2024. The latest is FM-5660-ID (Tartar Fire), declared 2 Aug 2026.
Is Washington County in a drought?
Yes. On the U.S. Drought Monitor map valid 13 October 2026, 63.59% of Washington County is in D2 Severe Drought. Some of it has been at D2 or worse for 11 weeks in a row. In all, 95.15% of the county is in drought (D1 to D4).
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