Natural disaster risk in Lewis County, Washington

Washington · population 82,036 · FIPS 53041

Overall: relatively moderate risk

Lewis County has a composite risk score of 89.7 out of 100 — higher than 89% of US counties. It ranks 15 of 39 in Washington (1 = highest risk). Its highest-rated hazards are avalanche, earthquake, landslide.

Drought now: No, but abnormally dry (D0)

No drought, but abnormally dry. On the U.S. Drought Monitor map valid 13 October 2026, 66.36% of Lewis County is D0 Abnormally Dry and none of it is in drought (D1 to D4). Some of it has been abnormally dry or worse for at least 54 weeks in a row.

Drought in Lewis 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.	Relatively moderate 89.7
Expected annual loss About $70.9 million a year, on average, across all 18 hazards.	Relatively moderate 87.9
Social vulnerability Higher means people may find it harder to prepare and recover.	Relatively moderate 58.3
Community resilience Higher means a stronger ability to prepare, adapt and recover.	Relatively moderate 45.1

Risk by hazard

FEMA's risk rating for each of 18 natural hazards in Lewis County, highest first. "Not applicable" means the hazard is not modelled here.

Hazard	Risk rating and score
Avalanche	Relatively high 88
Earthquake	Relatively moderate 97
Landslide	Relatively moderate 96
Volcanic activity	Relatively moderate 95
Inland (riverine) flooding	Relatively moderate 90
Heat wave	Relatively low 77
Wildfire	Relatively low 76
Winter weather	Relatively low 40
Ice storm	Relatively low 35
Lightning	Relatively low 32
Strong wind	Relatively low 21
Tornado	Very low 17
Drought	Very low 13
Hail	Very low 5
Cold wave	Very low 3
Coastal flooding	Not applicable
Hurricane	Not applicable
Tsunami	Not applicable

FEMA disaster declarations for Lewis County

Federal declarations that designated Lewis County, since 1 Jan 2024 (the period this site keeps from OpenFEMA). Older declarations are in FEMA's own dataset.

Yes. Lewis 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 Lewis County, Washington?

FEMA's National Risk Index rates the overall risk in Lewis County as relatively moderate, with a score of 89.7 out of 100 (higher than 89% of US counties). That is a comparison with other US counties, not a forecast.

What are the biggest natural hazards in Lewis County?

The hazards rated highest for Lewis County are avalanche (relatively high), earthquake (relatively moderate), landslide (relatively moderate).

What is the flood risk in Lewis County?

FEMA rates inland (river and rain) flooding risk in Lewis County as relatively moderate. For a specific property, check the FEMA flood map and your local floodplain office.

Has Lewis County had a FEMA disaster declaration?

Yes. Lewis 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 Lewis County in a drought?

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