Alfalfa County, Oklahoma: Natural Disaster Risk and History
Alfalfa County, Oklahoma has a Very Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 40.6 out of 100, higher than about 40% of US counties, with ice storms, drought and cold waves scoring highest of its 18 hazards and $10 million a year in expected losses.
OpenFEMA lists 28 federal disaster declarations that included Alfalfa County since 1993, not counting 2 for COVID-19; the latest is DR-4587-OK (Severe Winter Storms, declared 24 February 2021). NOAA's Storm Prediction Center recorded 52 tornadoes touching Alfalfa County from 1950 to 2025.
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Population 5,699 Buildings worth $1.3 billion Area 890 sq mi Risk rank in Oklahoma 52 of 77 FIPS 40003
All 18 hazards, highest risk first
FEMA National Risk Index| Hazard | Risk rating | Score | Expected loss a year | How often | Events in record |
|---|---|---|---|---|---|
| Ice storm | Relatively High | 94.1 | $1.2 million | about once every 1.3 years | 54 |
| Drought | Relatively Moderate | 90.2 | $1.3 million | about 75 a year | 2,205 |
| Cold wave | Relatively Moderate | 82.9 | $3.5 million | about 2.8 a year | 54 |
| Hail | Relatively Low | 69.4 | $430,156 | about 8.5 a year | 323 |
| Wildfire | Very Low | 60.9 | $70,714 | about once every 412 years | — |
| Heat wave | Relatively Low | 47.8 | $266,570 | about 12 a year | 190 |
| Tornado | Relatively Low | 44.7 | $825,037 | about once every 1.3 years | 37 |
| Strong wind | Relatively Low | 37.3 | $298,372 | about 4.7 a year | 179 |
| Earthquake | Very Low | 25.3 | $36,384 | about once every 952 years | — |
| Inland flooding | Very Low | 22.4 | $2.1 million | about once every 1.5 years | 19 |
| Hurricane | Very Low | 22.4 | $5,896 | about once every 118 years | 0 |
| Landslide | Very Low | 22.4 | $118 | about once every 8.4 years | — |
| Winter weather | Very Low | 21.1 | $14,802 | about 9.2 a year | 175 |
| Lightning | Very Low | 9.1 | $23,604 | about 5 a year | 79,579 strikes |
| Avalanche | Not Applicable | — | — | — | — |
| Coastal flooding | Not Applicable | — | — | — | — |
| Tsunami | Not Applicable | — | — | — | — |
| Volcanic activity | 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 28
Most common: Severe Storm 16, Severe Ice Storm 8, Tornado 2, Fire 1.
| Decade | Declarations | Incident types |
|---|---|---|
| 1990s | 3 | Severe Storm ×2, Tornado |
| 2000s | 10 | Severe Storm ×5, Severe Ice Storm ×3, Fire, Hurricane |
| 2010s | 12 | Severe Storm ×9, Severe Ice Storm ×2, Tornado |
| 2020s | 3 | Severe Ice Storm ×3 |
The last 10
Widest declarations that included Alfalfa County
- Severe Winter Storms (2021, DR-4587-OK): 77 Oklahoma counties designated.
- Severe Winter Storm (2021, EM-3555-OK): 77 Oklahoma counties designated.
- Severe Winter Storm (2011, EM-3316-OK): 77 Oklahoma 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. Oklahoma also had 24 statewide declarations with no county list.
Tornado record since 1950 52
| Tornadoes touching the county | 52 |
|---|---|
| Strongest-rated | (E)F3 ×1 |
| Peak month | April (15) |
| Deadliest | 30 Apr 1973, F2, 13.4 mi path, 0 killed, 6 injured |
| Longest path | 17 Apr 2002, F2, 34 mi path, 0 killed, 1 injured |
| Most recent | 24 Nov 2025, EF0, 0.1 mi path |
| Deaths / injuries on those paths | 0 / 9 |
| Rating | (E)F0 | (E)F1 | (E)F2 | (E)F3 | (E)F4 | (E)F5 | Unrated |
|---|---|---|---|---|---|---|---|
| Count | 20 | 16 | 13 | 1 | 0 | 0 | 2 |
| Decade | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
|---|---|---|---|---|---|---|---|---|
| Count | 9 | 4 | 3 | 5 | 11 | 8 | 6 | 6 |
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 Alfalfa County compares with its 5 nearest counties
| County | Distance | Overall risk | Score | Top hazard |
|---|---|---|---|---|
| Alfalfa County (this page) | — | Very Low | 40.6 | Ice storm |
| Woods County | 48 km | Very Low | 28.1 | Cold wave |
| Grant County | 48 km | Very Low | 27.8 | Ice storm |
| Major County | 50 km | Very Low | 34.2 | Ice storm |
| Harper County, KS | 56 km | Very Low | 31.3 | Drought |
| Garfield County | 62 km | Relatively Moderate | 82.1 | Cold wave |
Nearest by distance between county centres. Every county in Oklahoma, ranked.
Vulnerability and resilience
| Social vulnerability | Relatively High 69.4 |
|---|---|
| Community resilience | Relatively Moderate 45.8 |
| Community risk factor | 1.32 |
| Expected annual loss, all hazards | $10 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 Alfalfa County's main hazards
- Right now: National Weather Service alerts for Oklahoma · all official warnings on Global Incident Tracker.
- Ice storm: Power outages now · Carbon monoxide in winter
- Drought: Drought monitor for Oklahoma
- Cold wave: Carbon monoxide in winter · Power outages now
- 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 Alfalfa County
What natural disasters is Alfalfa County, Oklahoma most at risk from?
Alfalfa County, Oklahoma has a Very Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 40.6 out of 100, higher than about 40% of US counties, with ice storms, drought and cold waves scoring highest of its 18 hazards and $10 million a year in expected losses.
How many federal disaster declarations has Alfalfa County had?
OpenFEMA lists 28 federal disaster declarations that included Alfalfa County since 1993, not counting 2 for COVID-19; the latest is DR-4587-OK (Severe Winter Storms, declared 24 February 2021). Another 24 Oklahoma declarations were made statewide without a county list.
How many tornadoes have hit Alfalfa County?
NOAA's Storm Prediction Center recorded 52 tornadoes touching Alfalfa County from 1950 to 2025. The deadliest: 30 Apr 1973, F2, 13.4 mi path, 0 killed, 6 injured (deaths and injuries are for the whole path).
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.