FEMA NRI v1.20Released December 2025Methodology

Washington Disaster Risk

Natural disaster risk data for all 39 counties.

FEMA release

December 2025

Mean county NRI score

70.0

Counties with Data

of 39 total

County risk atlas

Washington hazard exposure by county

FEMA NRI v1.20 scores on a 0–100 relative scale. Toggle the composite and five selected hazard categories out of FEMA's 18. Flood is the higher of Coastal Flooding and Inland Flooding NRI scores.

Counties

39/39

Mean county NRI score

70.0

Risk layers

Highest Risk Counties

King County

Very High

NRI score 99.7

Pierce County

Relatively High

NRI score 98.5

Snohomish County

Relatively High

NRI score 97.9

Grays Harbor County

Relatively High

NRI score 97.0

Thurston County

Relatively High

NRI score 94.5

Lowest Risk Counties

Garfield County

Very Low

NRI score 1.6

Columbia County

Very Low

NRI score 8.6

Asotin County

Very Low

NRI score 17.9

Wahkiakum County

Very Low

NRI score 19.3

Adams County

Very Low

NRI score 23.2

All Washington Counties

County	NRI score	FEMA Rating	Flood	Wildfire	Tornado	Earthquake
King County	99.7	Very High	99.5	79.5	73.2	99.9
Pierce County	98.5	Relatively High	96.2	76.8	41.2	99.6
Snohomish County	97.9	Relatively High	95.7	61.5	38.8	99.3
Grays Harbor County	97.0	Relatively High	99.0	33.9	13.2	98.1
Thurston County	94.5	Relatively High	90.8	57.1	25.0	98.9
Yakima County	94.0	Relatively Moderate	92.9	98.9	19.5	97.4
Pacific County	92.7	Relatively Moderate	75.0	27.7	7.3	95.1
Kitsap County	92.3	Relatively Moderate	79.4	39.9	23.7	98.7
Clark County	92.2	Relatively Moderate	92.6	69.6	31.3	97.6
Whatcom County	91.0	Relatively Moderate	88.9	61.7	13.1	97.8
Chelan County	90.9	Relatively Moderate	91.3	99.6	9.3	88.8
Cowlitz County	90.3	Relatively Moderate	88.3	61.3	20.5	97.5
Spokane County	90.0	Relatively Moderate	91.6	96.6	42.7	85.9
Clallam County	89.7	Relatively Moderate	75.0	39.7	12.0	98.1
Lewis County	89.7	Relatively Moderate	90.9	76.7	17.4	97.3
Okanogan County	89.2	Relatively Moderate	89.1	99.3	6.6	86.2
Kittitas County	89.1	Relatively Moderate	74.8	99.7	7.4	93.9
Skagit County	88.8	Relatively Moderate	91.4	52.5	11.2	97.0
Benton County	87.1	Relatively Moderate	89.7	96.7	19.6	93.1
Mason County	85.3	Relatively Moderate	79.3	44.1	13.8	97.2
Island County	78.0	Relatively Low	73.4	35.4	11.3	96.3
Grant County	76.9	Relatively Low	77.2	95.8	15.5	89.2
Douglas County	74.1	Relatively Low	82.1	94.7	6.7	81.6
Klickitat County	73.9	Relatively Low	66.6	98.4	6.3	78.4
Franklin County	72.5	Relatively Low	83.5	84.6	12.5	80.7
Jefferson County	64.4	Relatively Low	64.4	23.5	9.5	95.0
Walla Walla County	60.4	Relatively Low	64.8	83.5	11.8	90.6
Stevens County	60.3	Relatively Low	68.6	96.5	12.5	43.0
Lincoln County	54.9	Relatively Low	50.0	96.7	7.6	63.0
Ferry County	51.7	Relatively Low	52.3	97.4	4.4	45.1
Skamania County	49.7	Relatively Low	49.8	93.9	5.6	87.1
Whitman County	39.8	Very Low	58.8	68.3	10.4	55.1
San Juan County	35.4	Very Low	58.4	41.3	4.4	89.4
Pend Oreille County	28.0	Very Low	54.3	76.9	5.9	27.7
Adams County	23.2	Very Low	34.3	85.2	7.2	64.6
Wahkiakum County	19.3	Very Low	70.4	12.2	3.9	75.2
Asotin County	17.9	Very Low	38.5	89.4	6.9	32.7
Columbia County	8.6	Very Low	30.7	73.3	3.2	34.0
Garfield County	1.6	Very Low	10.3	69.2	2.1	18.9

Frequently Asked Questions

How many Washington county records are included?

RiskByCounty includes 39 Washington county records from FEMA NRI v1.20 (December 2025).

Which FEMA county ratings appear in Washington?

FEMA NRI v1.20 (December 2025) county rating counts for Washington: Very Low: 8; Relatively Low: 11; Relatively Moderate: 15; Relatively High: 4; Very High: 1; Not available: 0.

How complete are the five selected hazard fields for Washington?

FEMA NRI v1.20 (December 2025) availability among 39 county records: Flood: 39 of 39; Wildfire: 39 of 39; Tornado: 39 of 39; Earthquake: 39 of 39; Hurricane: 0 of 39. RiskByCounty displays five selected hazard categories out of FEMA's 18.

Official Ready.gov resource

Continue to Ready.gov for federal emergency-planning information maintained outside RiskByCounty.

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Data Source

County data sourced from FEMA National Risk Index v1.20, released December 2025. Values are labeled NRI score (0–100 relative scale). RiskByCounty displays five selected hazard categories out of FEMA's 18; flood is the higher of the Coastal Flooding and Inland Flooding source scores.

RiskByCounty presents county-level source fields and deterministic arithmetic summaries.

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