Delaware County, New York
Natural disaster risk, federal disaster history and flood insurance facts.
Delaware County, New York has a moderate overall risk from natural hazards in FEMA's National Risk Index. Its risk score is higher than 83% of US counties. It ranks 21st of 62 counties in New York. The costliest hazards here are inland flooding, cold waves and tornadoes. FEMA estimates about $35 million a year in expected losses, or roughly $805 per resident. Since 1965 it has been included in 35 federal disaster or emergency declarations for natural events (26 major disasters). The most recent was in September 2024 (remnants of tropical storm debby). About 1 in 53 homes here carry federal flood insurance (534 policies). Since 1978, federal flood insurance has paid about $40 million on 1,291 claims here, including $19 million for floods in 2006.
FEMA National Risk Index December 2025; OpenFEMA declarations to Nov 6, 2026; NFIP records. Updated November 6, 2026.
Top risks in Delaware 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.
- Insulate pipes in outside walls, crawl spaces and garages.
- Know how to shut off the main water valve.
- Pick a shelter spot: a basement, or an inside room on the lowest floor with no windows.
- Turn on emergency alerts on your phone and keep a weather radio.
All 18 hazards
What the ratings mean ›| Hazard | Rating | Score | Expected loss a year | |
|---|---|---|---|---|
| Inland flooding | 91.2 | $31M | ||
| Cold wave | 69.8 | $1M | ||
| Tornado | 55.6 | $1M | ||
| Hurricane | 76.8 | $902K | ||
| Strong wind | 51.8 | $410K | ||
| Earthquake | 50.4 | $199K | ||
| Lightning | 49.1 | $159K | ||
| Hail | 38.1 | $118K | ||
| Winter weather | 72.5 | $102K | ||
| Heat wave | 21.1 | $49K | ||
| Ice storm | 42.3 | $42K | ||
| Landslide | 90.0 | $40K | ||
| Wildfire | 18.7 | $5K | ||
| Avalanche | 69.3 | $3K |
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 high 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 Delaware County. 2020s bar runs to November 2026.
By type
Most recent
Show all 35
New York also had 12 statewide declarations that did not name single counties.
Storm history since 1956
Tornado risk by county ›The National Weather Service has logged 563 storm reports in Delaware County since 1956, with 14 deaths and 4 injuries and about $373 million in reported damage. The strongest on record here was an F3 tornado on May 31, 1998 near Deposit.
Strongest tornadoes
| Date | Strength | Near | Hurt / killed |
|---|---|---|---|
| May 31, 1998 | F3 | Deposit | 0 / 0 |
| Oct 1, 1986 | F2 | – | 0 / 0 |
| Jun 21, 1990 | F1 | – | 0 / 0 |
| Jun 26, 1998 | F1 | Colchester | 0 / 0 |
| Sep 25, 2022 | EF1 | Beerston | 0 / 0 |
Most damaging storms
| Date | Type | Near | Damage |
|---|---|---|---|
| Jun 27, 2006 | Flash Flood | Countywide | $250M |
| Jun 19, 2007 | Flash Flood | Colchester | $30M |
| Sep 18, 2004 | Flash Flood | Countywide | $12M |
| Jun 27, 2006 | Flood | Walton | $10M |
| Jun 27, 2006 | Flood | Unadilla | $10M |
| Jul 23, 2008 | Flash Flood | Colchester | $10M |
Source: NOAA Storm Events Database, county-based reports through Jul 21, 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.
Hurricanes and tropical storms
Hurricane risk by county ›Since 1876, 1 hurricane and 6 tropical storms have passed within 65 miles of the center of Delaware County, 2 of them since 1950. The strongest was an unnamed hurricane in 1878, with top winds near 80 mph about 53 miles away.
Strongest storms nearby
| Date | Storm | Strength | Closest |
|---|---|---|---|
| Oct 23, 1878 | Unnamed | Category 1, 80 mph | 53 mi |
| Aug 29, 1893 | Unnamed | Tropical storm, 65 mph | 61 mi |
| Aug 4, 2020 | Isaias | Tropical storm, 60 mph | 55 mi |
| Aug 29, 1949 | Unnamed | Tropical storm, 55 mph | 30 mi |
| Sep 6, 1979 | David | Tropical storm, 45 mph | 54 mi |
| Sep 18, 1876 | Unnamed | Tropical storm, 45 mph | 64 mi |
Most recent storms
| Date | Storm | Strength | Closest |
|---|---|---|---|
| Aug 4, 2020 | Isaias | Tropical storm, 60 mph | 55 mi |
| Sep 6, 1979 | David | Tropical storm, 45 mph | 54 mi |
| Aug 29, 1949 | Unnamed | Tropical storm, 55 mph | 30 mi |
| Aug 24, 1933 | Unnamed | Tropical storm, 40 mph | 65 mi |
| Aug 29, 1893 | Unnamed | Tropical storm, 65 mph | 61 mi |
| Oct 23, 1878 | Unnamed | Category 1, 80 mph | 53 mi |
Source: NOAA National Hurricane Center best-track records (HURDAT2), 1851 to 2025 for the Atlantic and 1949 to 2025 for the eastern Pacific. A storm counts if its track passed within 65 miles of the county's center while it was a tropical storm or hurricane. Strength is the storm's top sustained wind at that point, not the wind measured in the county. Older storms over the open sea were sometimes missed.
Flood insurance in Delaware 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 Delaware 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; 30,057 housing units.
Compare in New York
All 62 ›| Largest counties | Overall risk | Top hazard |
|---|---|---|
| Kings County | Inland flooding | |
| Queens County | Inland flooding | |
| New York County | Inland flooding | |
| Suffolk County | Inland flooding | |
| Bronx County | Inland flooding | |
| Nassau County | Inland flooding | |
| Westchester County | Inland flooding | |
| Erie County | Inland flooding |
Neighboring counties
| County | Overall risk | Declarations |
|---|---|---|
| Broome County | 26 | |
| Ulster County | 33 | |
| Sullivan County | 31 | |
| Otsego County | 23 | |
| Wayne County, PA | 23 | |
| Greene County | 25 | |
| Chenango County | 27 | |
| Schoharie County | 25 |
Common questions about Delaware County
What is the biggest natural hazard in Delaware County?
Inland flooding has the highest expected yearly losses in Delaware County, about $30.9 million a year in FEMA's estimate. Cold wave is second at $1.5 million.
How many federal disasters has Delaware County had?
Delaware County has been included in 35 federal disaster or emergency declarations for natural events since 1965, including 26 major disasters. The most recent was Remnants of Tropical Storm Debby in September 2024.
Is Delaware County a high-risk place to live?
Its overall rating is Relatively Moderate, 21st highest of 62 in New York. 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 Delaware County?
Standard home insurance does not cover flooding. About 1 in 53 homes in Delaware 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 Delaware County had?
NOAA records list 12 tornadoes in Delaware County since 1950. The strongest was an F3 tornado on May 31, 1998 near Deposit. The weather service has also logged 108 hail reports and 107 floods here.
How many hurricanes have hit Delaware County?
NOAA's hurricane records show 1 hurricane and 6 tropical storms passing within 65 miles of the center of Delaware County. The strongest was an unnamed hurricane in 1878, with winds near 80 mph.
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.