Natural disaster risk in King County, Washington
Washington · population 2,268,178 · FIPS 53033
Overall: very high risk
King County has a composite risk score of 99.7 out of 100 — among the highest 1% of US counties. It ranks 1 of 39 in Washington (1 = highest risk). Its highest-rated hazards are avalanche, earthquake, inland (riverine) flooding.
Drought now: Yes: D1 Moderate Drought, 14 weeks
Yes. On the U.S. Drought Monitor map valid 13 October 2026, 14.83% of King County is in D1 Moderate Drought. Some of it has been at D1 or worse for 14 weeks in a row.
Drought in King 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 high 99.7 |
| Expected annual loss About $1.7 billion a year, on average, across all 18 hazards. |
Very high 99.7 |
| Social vulnerability Higher means people may find it harder to prepare and recover. |
Very low 14.8 |
| Community resilience Higher means a stronger ability to prepare, adapt and recover. |
Very high 87.4 |
Risk by hazard
FEMA's risk rating for each of 18 natural hazards in King County, highest first. "Not applicable" means the hazard is not modelled here.
| Hazard | Risk rating and score |
|---|---|
| Avalanche | Very high 99 |
| Earthquake | Very high 99 |
| Inland (riverine) flooding | Very high 99 |
| Heat wave | Relatively high 98 |
| Landslide | Relatively high 98 |
| Volcanic activity | Relatively high 97 |
| Winter weather | Relatively high 94 |
| Ice storm | Relatively high 91 |
| Lightning | Relatively moderate 74 |
| Tornado | Relatively moderate 73 |
| Coastal flooding | Relatively moderate 71 |
| Wildfire | Relatively low 79 |
| Tsunami | Relatively low 67 |
| Cold wave | Relatively low 26 |
| Drought | Very low 13 |
| Strong wind | Very low 4 |
| Hail | Very low 3 |
| Hurricane | Not applicable |
FEMA disaster declarations for King County
Federal declarations that designated King County, since 1 Jan 2024 (the period this site keeps from OpenFEMA). Older declarations are in FEMA's own dataset.
Yes. King County has been named in 3 FEMA declarations since 1 Jan 2024. The latest is DR-4906-WA (Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides), declared 7 Apr 2026.
| Declaration | Kind | Incident | Declared | Individual assistance here |
|---|---|---|---|---|
| DR-4906-WA | Major disaster | Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides | 7 Apr 2026 | Yes |
| EM-3629-WA | Emergency | Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides | 12 Dec 2025 | No |
| DR-4775-WA | Major disaster | Severe Winter Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides | 28 Apr 2024 | No |
All FEMA declarations in Washington, 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 King County, Washington?
FEMA's National Risk Index rates the overall risk in King County as very high, with a score of 99.7 out of 100 (among the highest 1% of US counties). That is a comparison with other US counties, not a forecast.
What are the biggest natural hazards in King County?
The hazards rated highest for King County are avalanche (very high), earthquake (very high), inland (riverine) flooding (very high).
What is the flood risk in King County?
FEMA rates inland (river and rain) flooding risk in King County as very high, and coastal flooding risk as relatively moderate. For a specific property, check the FEMA flood map and your local floodplain office.
Has King County had a FEMA disaster declaration?
Yes. King County has been named in 3 FEMA declarations since 1 Jan 2024. The latest is DR-4906-WA (Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides), declared 7 Apr 2026.
Is King County in a drought?
Yes. On the U.S. Drought Monitor map valid 13 October 2026, 14.83% of King County is in D1 Moderate Drought. Some of it has been at D1 or worse for 14 weeks in a row.
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