Walla Walla, WA
Walla Walla County in Washington has 5 FEMA disaster declarations on record covering 1964–2020, most recently Severe Storms, Flooding, Landslides, and Mudslides on Apr 23, 2020 (DR-4539). Its flood risk grade is A (Low risk), ranking #1877 of 3,277 U.S. counties, with 5 NFIP flood insurance claims totaling $166,518 in payouts. Flood risk is relatively low compared to the national average.
FEMA Disaster Declarations in Walla Walla County
The 5 most recent federally declared disasters affecting Walla Walla County, WA (1964–2020). Total declarations on record: 5.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| Apr 23, 2020 | Flood | Severe Storms, Flooding, Landslides, and Mudslides | DR-4539 |
| Apr 21, 2017 | Flood | Severe Winter Storms, Flooding, Landslides, Mudslides | DR-4309 |
| Sep 7, 2005 | Coastal Storm | Hurricane Katrina Evacuation | DR-3227 |
| Feb 9, 1996 | Flood | High Winds, Severe Storms and Flooding | DR-1100 |
| Dec 29, 1964 | Flood | Heavy Rains & Flooding | DR-185 |
Score Breakdown
The composite score of 10 is calculated from four weighted factors. See our methodology for details.
Other Counties in Washington
| County | Grade | Score | Claims | Disasters |
|---|---|---|---|---|
| Cowlitz | A | 10 | 7 | 12 |
| Franklin | A | 10 | 0 | 4 |
| Okanogan | A | 10 | 4 | 4 |
| San Juan | A | 10 | 1 | 5 |
| Lincoln | A | 10 | 0 | 5 |
| Stevens | A | 10 | 1 | 4 |
More Counties in Washington
Frequently Asked Questions
How many FEMA disaster declarations does Walla Walla County, WA have?
Walla Walla County, WA has 5 federal disaster declarations on FEMA record (1964–2020). The 5 most recent are: Severe Storms, Flooding, Landslides, and Mudslides (declared Apr 23, 2020, DR-4539); Severe Winter Storms, Flooding, Landslides, Mudslides (declared Apr 21, 2017, DR-4309); Hurricane Katrina Evacuation (declared Sep 7, 2005, DR-3227); High Winds, Severe Storms and Flooding (declared Feb 9, 1996, DR-1100); Heavy Rains & Flooding (declared Dec 29, 1964, DR-185). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for Walla Walla County, WA?
Walla Walla County is graded A (composite score 10/100, low risk). It ranks #1877 of 3,277 U.S. counties for flood risk in our scoring model. The grade combines NFIP claims density (40%), disaster frequency (25%), claim severity (20%), and year-over-year trend (15%).
How many NFIP flood insurance claims have been filed in Walla Walla County?
5 NFIP flood insurance claims have been filed in Walla Walla County, WA, totaling $166,518 in payouts. The average claim is $33,304. Source: FEMA FimaNfipClaims v2 dataset.
Has Walla Walla County, WA had any recent flood disasters?
Yes. The most recent FEMA declaration affecting Walla Walla County was Severe Storms, Flooding, Landslides, and Mudslides on Apr 23, 2020 (DR-4539). The county has 5 declared disasters in the OpenFEMA record covering 1964–2020.
For this entity, the underlying data on this page comes from FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims. The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
Every number on this page links back to FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. ZIPs, counties, and states with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: FEMA OpenFEMA datasets, 2026.