Franklin County, Washington: Natural Disaster Risk and History
Franklin County, Washington has a Relatively Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 72.5 out of 100, higher than about 72% of US counties, with heat waves, wildfires and inland (river and flash) flooding scoring highest of its 18 hazards and $33 million a year in expected losses.
OpenFEMA lists 9 federal disaster declarations that included Franklin County since 1977, not counting 2 for COVID-19; the latest is DR-4650-WA (Severe Winter Storms, Snowstorms, Straight-Line Winds, Flooding, declared 29 March 2022). NOAA's Storm Prediction Center recorded 2 tornadoes touching Franklin County from 1950 to 2025.
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Population 96,653 Buildings worth $16 billion Area 1,278 sq mi Risk rank in Washington 25 of 39 FIPS 53021
All 18 hazards, highest risk first
FEMA National Risk Index| Hazard | Risk rating | Score | Expected loss a year | How often | Events in record |
|---|---|---|---|---|---|
| Heat wave | Relatively Moderate | 87.7 | $2.6 million | about 7.9 a year | 109 |
| Wildfire | Relatively Low | 84.6 | $698,337 | about once every 158 years | — |
| Inland flooding | Relatively Moderate | 83.5 | $24 million | about once every 4.7 years | 6 |
| Earthquake | Relatively Low | 80.7 | $1.8 million | about once every 250 years | — |
| Ice storm | Relatively Moderate | 78.6 | $380,745 | about once every 3.6 years | 19 |
| Volcanic activity | Very Low | 75.6 | $207 | about once every 769 years | 3 |
| Cold wave | Relatively Moderate | 65.5 | $1.8 million | about once every 2.4 years | 8 |
| Landslide | Very Low | 51.8 | $1,564 | about once every 2.7 years | — |
| Lightning | Relatively Low | 45.0 | $202,393 | about 8.1 a year | 22,348 strikes |
| Winter weather | Relatively Low | 44.8 | $56,397 | about 7.9 a year | 151 |
| Hail | Relatively Low | 42.7 | $205,004 | about once every 5.2 years | 7.3 |
| Strong wind | Relatively Low | 41.2 | $445,349 | about once every 3.3 years | 12 |
| Drought | Very Low | 22.7 | $7,848 | about 15 a year | 518 |
| Avalanche | Very Low | 22.5 | $53 | about once every 100 years | 0 |
| Tornado | Very Low | 12.5 | $105,395 | about once every 23 years | 0 |
| Coastal flooding | Not Applicable | — | — | — | — |
| Hurricane | Not Applicable | — | — | — | — |
| Tsunami | Not Applicable | — | — | — | — |
Score: FEMA's percentile among US counties that face the hazard (higher = more risk). Expected loss: FEMA's modelled average yearly loss to buildings, people (as a statistical value) and crops. How often: FEMA's annualised frequency of the hazard in the county; for some hazards it counts event-days, so it is a rough guide, not a forecast. "Not Applicable" means FEMA does not model that hazard here.
Federal disaster declarations 9
Most common: Flood 3, Severe Storm 2, Fire 1, Coastal Storm 1.
| Decade | Declarations | Incident types |
|---|---|---|
| 1970s | 2 | Flood, Drought |
| 1980s | 1 | Volcanic Eruption |
| 1990s | 1 | Severe Storm |
| 2000s | 2 | Severe Storm, Coastal Storm |
| 2010s | 1 | Flood |
| 2020s | 2 | Flood, Fire |
The last 9
Widest declarations that included Franklin County
- Hurricane Katrina Evacuation (2005, EM-3227-WA): 39 Washington counties designated.
- Volcanic Eruption, Mt. St. Helens (1980, DR-623-WA): 39 Washington counties designated.
- Severe Winter Storms, Land & Muds Slides,flooding (1997, DR-1159-WA): 38 Washington counties designated.
Named storms in its declarations: Hurricane Katrina (2005).
Not counted above: 2 COVID-19 ("Biological") declarations — in 2020 every US county was included. Washington also had 25 statewide declarations with no county list.
Tornado record since 1950 2
| Tornadoes touching the county | 2 |
|---|---|
| Strongest-rated | (E)F1 ×2 |
| Peak month | April (1) |
| Deadliest | — |
| Longest path | 23 Apr 1983, F1, 3 mi path |
| Most recent | 23 Apr 1983, F1, 3 mi path |
| Deaths / injuries on those paths | 0 / 0 |
| Rating | (E)F0 | (E)F1 | (E)F2 | (E)F3 | (E)F4 | (E)F5 | Unrated |
|---|---|---|---|---|---|---|---|
| Count | 0 | 2 | 0 | 0 | 0 | 0 | 0 |
| Decade | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
|---|---|---|---|---|---|---|---|---|
| Count | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
Deaths and injuries are for each tornado's whole path, which can run beyond this county. F-scale ratings before February 2007, Enhanced Fujita (EF) after.
How Franklin County compares with its 5 nearest counties
| County | Distance | Overall risk | Score | Top hazard |
|---|---|---|---|---|
| Franklin County (this page) | — | Relatively Low | 72.5 | Heat wave |
| Walla Walla County | 47 km | Relatively Low | 60.4 | Earthquake |
| Adams County | 56 km | Very Low | 23.2 | Wildfire |
| Benton County | 57 km | Relatively Moderate | 87.1 | Wildfire |
| Columbia County | 80 km | Very Low | 8.6 | Wildfire |
| Grant County | 86 km | Relatively Low | 76.9 | Wildfire |
Nearest by distance between county centres. Every county in Washington, ranked.
Vulnerability and resilience
| Social vulnerability | Relatively Low 31.5 |
|---|---|
| Community resilience | Very Low 15.5 |
| Community risk factor | 1.00 |
| Expected annual loss, all hazards | $33 million |
FEMA scales expected losses up where social vulnerability is high (people who may find it harder to prepare, evacuate or recover) and down where community resilience is high. A factor above 1 raises the risk score. For social vulnerability a high rating is worse; for resilience a high rating is better.
Prepare for Franklin County's main hazards
- Right now: National Weather Service alerts for Washington · all official warnings on Global Incident Tracker.
- Heat wave: Heatstroke warning signs
- Wildfire: US wildfires now · Wildfire smoke: what protects you
- Inland flooding: Flood safety: why shallow water kills · Floods recorded
- Your property's flood zone: FEMA Flood Map Service Center ↗ — this page cannot tell you that.
- Official preparedness guidance: Ready.gov ↗ and your county emergency management office.
What this page shows, and what it misses
FEMA's National Risk Index rates a whole county against every other US county; it is a planning-level estimate for nationwide comparison, not a flood-zone map and not a substitute for a local risk assessment or the risk to one home. Declarations are presidential disaster, emergency and fire management declarations that named this county; state declarations and SBA or USDA designations are not included. Tornadoes are counted when the county is one of up to four listed on the track; 670 tornadoes that crossed a state line carry no county list in NOAA's file and are left out.
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties - v1.20.0 (December 2025). Retrieved from https://services.arcgis.com/XG15cJAlne2vxtgt/ArcGIS/rest/services/National_Risk_Index_Counties/FeatureServer/0/query on November 2, 2026, 1:20 PM EST. This product uses the Federal Emergency Management Agency’s National Risk Index dataset API or downloadable datasets 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).
Federal Emergency Management Agency (FEMA), OpenFEMA Dataset: Disaster Declarations Summaries - v2, retrieved from https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries on November 2, 2026, 1:21 PM EST. 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).
Tornado records: NOAA/NWS Storm Prediction Center, Severe Weather Database, tornadoes 1950–2025 (https://www.spc.noaa.gov/wcm/data/1950-2025_actual_tornadoes.csv, downloaded 2 November 2026). Public domain; not endorsed by NOAA. Compiled by Global Incident Tracker.
Questions about Franklin County
What natural disasters is Franklin County, Washington most at risk from?
Franklin County, Washington has a Relatively Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 72.5 out of 100, higher than about 72% of US counties, with heat waves, wildfires and inland (river and flash) flooding scoring highest of its 18 hazards and $33 million a year in expected losses.
How many federal disaster declarations has Franklin County had?
OpenFEMA lists 9 federal disaster declarations that included Franklin County since 1977, not counting 2 for COVID-19; the latest is DR-4650-WA (Severe Winter Storms, Snowstorms, Straight-Line Winds, Flooding, declared 29 March 2022). Another 25 Washington declarations were made statewide without a county list.
How many tornadoes have hit Franklin County?
NOAA's Storm Prediction Center recorded 2 tornadoes touching Franklin County from 1950 to 2025.
Is the National Risk Index a flood zone map?
No. The National Risk Index is a planning-level estimate for a whole county, built for nationwide comparison. It does not tell you the flood zone or the risk of a single property: for that, look up the address on FEMA's Flood Map Service Center (msc.fema.gov) and ask your local floodplain manager.