Asotin County, Washington
Natural disaster risk, federal disaster history and flood insurance facts.
Asotin County, Washington has a very low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is lower than 82% of US counties. It ranks 37th of 39 counties in Washington. The costliest hazards here are inland flooding, wildfires and heat waves. FEMA estimates about $5.4 million a year in expected losses, or roughly $241 per resident. Since 1964 it has been included in 11 federal disaster or emergency declarations for natural events (8 major disasters). The most recent was in April 2026 (severe storms, straight-line winds, flooding, landslides and mudslides). Only 12 homes here carry federal flood insurance.
FEMA National Risk Index December 2025; OpenFEMA declarations to Nov 6, 2026; NFIP records. Updated November 6, 2026.
Top risks in Asotin County
- Check the FEMA flood map for your address, and ask the seller or landlord about past flooding.
- Price a flood policy now. Most new federal policies take 30 days to start.
- Clear dry plants and debris within 5 feet of the house.
- Get home insurance quotes early; availability varies by area.
- Check that cooling works before summer.
- Know where the nearest cooling center is.
All 18 hazards
What the ratings mean ›| Hazard | Rating | Score | Expected loss a year | |
|---|---|---|---|---|
| Inland flooding | 38.5 | $4M | ||
| Wildfire | 89.4 | $982K | ||
| Heat wave | 53.8 | $356K | ||
| Cold wave | 17.7 | $149K | ||
| Earthquake | 32.7 | $77K | ||
| Strong wind | 10.1 | $58K | ||
| Tornado | 6.9 | $27K | ||
| Lightning | 8.9 | $23K | ||
| Hail | 7.0 | $16K | ||
| Winter weather | 19.5 | $14K | ||
| Ice storm | 13.7 | $6K | ||
| Landslide | 72.3 | $6K | ||
| Avalanche | 70.8 | $4K | ||
| Drought | 13.8 | $155 |
Scores are percentiles: a score of 90 means higher risk than about 90% of US counties for that hazard. Hazards FEMA does not rate here are left out. Social vulnerability is relatively high and community resilience is relatively low in FEMA's measures.
Federal disaster history
Recent disasters nationwide ›Declarations by decade
Federal declarations for natural events that included Asotin County. 2020s bar runs to November 2026.
By type
Most recent
Show all 11
Washington also had 51 statewide declarations that did not name single counties.
Storm history since 1961
Tornado risk by county ›The National Weather Service has logged 48 storm reports in Asotin County since 1961 and about $1.8 million in reported damage. No tornadoes are on record here.
Most damaging storms
| Date | Type | Near | Damage |
|---|---|---|---|
| Apr 13, 2017 | Flash Flood | Mountain View | $2M |
| Jun 5, 2022 | Flash Flood | Clarkston Hgts | $110K |
| Sep 25, 1998 | Flash Flood | Clarkston | $30K |
| Sep 8, 1998 | Flash Flood | Clarkston | $30K |
| Jun 5, 2022 | Thunderstorm Wind | Clarkston Hgts | $20K |
| Jun 9, 2023 | Flash Flood | Clarkston Hgts | $20K |
Source: NOAA Storm Events Database, county-based reports through Sep 25, 2024. Tornado records start in 1950, hail and wind in 1955, and floods and other storm types in 1996, so older decades undercount. Damage is in dollars of the year it happened and is often an estimate. Winter storms, heat and hurricanes are logged by forecast zone, not county, so they are not counted here.
Flood insurance in Asotin County
Check your address flood zone ›National Flood Insurance Program (NFIP) records only; private flood policies are not included. Home counts as of Aug 3, 2026. Since 2021 NFIP prices each home separately under Risk Rating 2.0, so your price depends on the building, not the county. Ask an agent for a quote.
Homes in Asotin County
Older homes and mobile homes usually suffer more damage in storms, floods and earthquakes, and can cost more to insure. If you are buying, ask about roof age, foundation bolting and any retrofits. Source: US Census Bureau, American Community Survey 2020 to 2024 5-year estimates; 10,183 housing units.
Compare in Washington
All 39 ›| Largest counties | Overall risk | Top hazard |
|---|---|---|
| King County | Earthquake | |
| Pierce County | Earthquake | |
| Snohomish County | Earthquake | |
| Spokane County | Inland flooding | |
| Clark County | Inland flooding | |
| Thurston County | Earthquake | |
| Kitsap County | Earthquake | |
| Yakima County | Inland flooding |
Neighboring counties
| County | Overall risk | Declarations |
|---|---|---|
| Whitman County | 16 | |
| Nez Perce County, ID | 13 | |
| Wallowa County, OR | 9 | |
| Garfield County | 13 |
Common questions about Asotin County
What is the biggest natural hazard in Asotin County?
Inland flooding has the highest expected yearly losses in Asotin County, about $3.7 million a year in FEMA's estimate. Wildfire is second at $982,372.
How many federal disasters has Asotin County had?
Asotin County has been included in 11 federal disaster or emergency declarations for natural events since 1964, including 8 major disasters. The most recent was Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides in April 2026.
Is Asotin County a high-risk place to live?
Its overall rating is Very Low, 37th highest of 39 in Washington. A county rating covers the whole area. Risk at one address can be much higher or lower, so check the FEMA flood map and ask about the home's history.
Do I need flood insurance in Asotin County?
Standard home insurance does not cover flooding. About 1 in 1000 homes in Asotin County has federal flood insurance. Lenders require it in mapped high-risk zones, but many flood claims come from outside those zones.
How many tornadoes has Asotin County had?
NOAA records list 0 tornadoes in Asotin County since 1950. The weather service has also logged 21 hail reports and 9 floods here.
Sources: FEMA National Risk Index (December 2025), OpenFEMA Disaster Declarations Summaries, and NFIP policy and claims data. Hazard Compass is independent and not affiliated with FEMA. These figures describe the whole county, not a single property, and are not insurance or safety advice. Report a problem.