Thomas County, Kansas
Natural disaster risk, federal disaster history and flood insurance facts.
Thomas County, Kansas has a very low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is lower than 91% of US counties. It ranks 86th of 105 counties in Kansas. The costliest hazards here are hail, drought and inland flooding. FEMA estimates about $6.8 million a year in expected losses, or roughly $859 per resident. Since 1993 it has been included in 11 federal disaster or emergency declarations for natural events (9 major disasters). The most recent was in September 2026 (severe storms, straight-line winds, tornadoes and flooding). Only 17 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 Thomas County
- Ask about the roof age and any impact-rated shingles.
- Check your home policy for a separate wind and hail deductible.
- Check local water restrictions.
- Choose drought-tolerant plants.
- 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.
All 18 hazards
What the ratings mean ›| Hazard | Rating | Score | Expected loss a year | |
|---|---|---|---|---|
| Hail | 83.3 | $2M | ||
| Drought | 82.2 | $2M | ||
| Inland flooding | 6.3 | $1M | ||
| Tornado | 36.5 | $1M | ||
| Cold wave | 25.4 | $495K | ||
| Strong wind | 24.4 | $339K | ||
| Winter weather | 67.4 | $176K | ||
| Lightning | 24.4 | $126K | ||
| Heat wave | 12.8 | $41K | ||
| Earthquake | 17.5 | $33K | ||
| Ice storm | 22.9 | $30K | ||
| Wildfire | 15.4 | $8K | ||
| Landslide | 3.8 | $7 |
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 very low and community resilience is relatively high in FEMA's measures.
Federal disaster history
Recent disasters nationwide ›Declarations by decade
Federal declarations for natural events that included Thomas County. 2020s bar runs to November 2026.
By type
Most recent
Show all 11
Kansas also had 10 statewide declarations that did not name single counties.
Storm history since 1951
Tornado risk by county ›The National Weather Service has logged 964 storm reports in Thomas County since 1951, with 0 deaths and 8 injuries and about $23 million in reported damage. The strongest on record here was an F2 tornado on May 12, 1995 near Colby.
Strongest tornadoes
| Date | Strength | Near | Hurt / killed |
|---|---|---|---|
| May 12, 1995 | F2 | Colby | 1 / 0 |
| May 14, 1951 | F2 | – | 0 / 0 |
| Oct 29, 1956 | F2 | – | 0 / 0 |
| Oct 29, 1956 | F2 | – | 0 / 0 |
| Jun 11, 1984 | F1 | – | 0 / 0 |
Most damaging storms
| Date | Type | Near | Damage |
|---|---|---|---|
| Jul 12, 2010 | Hail | Colby Muni Arpt | $11M |
| Jun 8, 1994 | Hail | Colby | $5M |
| May 12, 1995 | Tornado | Colby | $4M |
| Jun 8, 1994 | Hail | Gem | $505K |
| Sep 3, 1963 | Tornado | – | $250K |
| Jun 11, 1984 | Tornado | – | $250K |
Source: NOAA Storm Events Database, county-based reports through Jul 27, 2026. 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 Thomas 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 Thomas 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; 3,575 housing units.
Compare in Kansas
All 105 ›| Largest counties | Overall risk | Top hazard |
|---|---|---|
| Johnson County | Inland flooding | |
| Sedgwick County | Inland flooding | |
| Shawnee County | Inland flooding | |
| Wyandotte County | Inland flooding | |
| Douglas County | Inland flooding | |
| Leavenworth County | Inland flooding | |
| Riley County | Inland flooding | |
| Butler County | Inland flooding |
Neighboring counties
| County | Overall risk | Declarations |
|---|---|---|
| Sherman County | 9 | |
| Logan County | 13 | |
| Decatur County | 10 | |
| Gove County | 11 | |
| Rawlins County | 9 | |
| Sheridan County | 15 |
Common questions about Thomas County
What is the biggest natural hazard in Thomas County?
Hail has the highest expected yearly losses in Thomas County, about $1.6 million a year in FEMA's estimate. Drought is second at $1.6 million.
How many federal disasters has Thomas County had?
Thomas County has been included in 11 federal disaster or emergency declarations for natural events since 1993, including 9 major disasters. The most recent was Severe Storms, Straight-Line Winds, Tornadoes, and Flooding in September 2026.
Is Thomas County a high-risk place to live?
Its overall rating is Very Low, 86th highest of 105 in Kansas. 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 Thomas County?
Standard home insurance does not cover flooding. About 1 in 250 homes in Thomas 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 Thomas County had?
NOAA records list 62 tornadoes in Thomas County since 1950. The strongest was an F2 tornado on May 12, 1995 near Colby. The weather service has also logged 496 hail reports and 35 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.