States › Oklahoma › Delaware County
Delaware County, Oklahoma
Recorded hazard history: storm events since 1950, federal disaster declarations since 1953, flood insurance claims since 1978, and FEMA's risk index.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. NCEI storm records through 30 Jun 2026; OpenFEMA declarations refreshed 29 Sep 2026; NFIP claims as of 8 Sep 2026.
Between 1950 and 2026, NCEI recorded 782 storm events in Delaware County, Oklahoma, led by damaging wind.
That is 106.0 events per 100 square miles, in line with the Oklahoma figure of 120.9, and 190.7 per 10,000 residents against 208.0 statewide.
12 events fall in the 12 months to 30 Jun 2026. NCEI attributes 2 deaths and 29 injuries to events in the county, with property damage estimated at $89M.
FEMA has designated the county in 33 federal disaster declarations since 1953; the most recent is Severe Storms, Straight-Line Winds, Tornadoes, And Flooding (major disaster, 14 Jun 2024).
National Flood Insurance Program policyholders in the county filed 115 claims since 1978, of which 90 were paid, totalling $1.7M (about $19K per paid claim). FEMA counts 85 residential flood policies in force.
FEMA's National Risk Index rates the county's overall risk as "Relatively Moderate" and its expected annual loss as "Relatively Low" ($30M a year across 18 hazards).
3 tropical storm or hurricane tracks in the HURDAT2 record passed within 100 miles of the county's centre at tropical-storm strength or more, 0 of them within 50 miles at hurricane strength.
Compared with Oklahoma and the United States
| Measure | Delaware County | Oklahoma | US |
|---|---|---|---|
| Recorded events since 1950 | 782 | 82,919 | 1,977,440 |
| Events per 100 square miles | 106.0 | 120.9 | 56.0 |
| Events per 10,000 residents | 190.7 | 208.0 | 59.6 |
| Events in the last 12 months | 12 | 2,570 | 62,008 |
| Deaths recorded by NCEI | 2 | 705 | 26,435 |
| Property damage (NCEI estimates) | $89M | $9.6B | $575B |
| NFIP claims per 1,000 residents | 2.8 | 3.3 | 8.1 |
| Average paid NFIP claim | $19K | $24K | $43K |
| Claims per 100 policies in force, last 10 years | 43.5 | 17.0 | 16.1 |
County-recorded events plus zone-recorded events whose forecast zone is named for the county. State and US rows include events recorded only by forecast zone. Rates use 2021 Census population and land area.
Events by decade
Trend: 364 events in the 20 years to 2025 against 376 in the 20 years before. Reporting practice changed in 1996 and again with automated reports in the 2000s, so decade totals measure the record as much as the weather.
Events by type
Hazard pages exist for hail, tornado, flood, wind and winter where the county has at least 10 recorded events. "Other" covers heavy rain, debris flow, dust, funnel clouds and similar reports.
Largest recorded events
| Date | Event type | Group | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|---|
| 16 Feb 2008 | Flash Flood | Flood | — | — | — | 1 | — | County |
| 17 Jun 2016 | Heat | Heat | — | — | — | 1 | — | Forecast zone |
| 22 May 2011 | Tornado | Tornado | EF2 | $400K | — | — | 12 | County |
| 12 Mar 2006 | Tornado | Tornado | F3 | $3.0M | — | — | 8 | County |
| 9 Dec 2007 | Ice Storm | Winter | — | $35M | — | — | — | Forecast zone |
| 14 Apr 2011 | Tornado | Tornado | EF2 | $100K | — | — | 3 | County |
| 1 Feb 2011 | Blizzard | Winter | — | $30M | — | — | — | Forecast zone |
| 16 May 2003 | Tornado | Tornado | F1 | $1.0M | — | — | 2 | County |
| 22 May 2011 | Tornado | Tornado | EF3 | $1.0M | — | — | 2 | County |
| 8 May 1989 | Tornado | Tornado | F2 | $250K | — | — | 1 | County |
| 15 Nov 1987 | Thunderstorm Wind | Wind | 0 mph | — | — | — | 1 | County |
| 12 Jan 2007 | Winter Storm | Winter | — | $3.0M | — | — | — | Forecast zone |
| 7 Apr 1980 | Tornado | Tornado | F3 | $2.5M | — | — | — | County |
| 27 Apr 1984 | Tornado | Tornado | F2 | $2.5M | — | — | — | County |
| 22 May 2011 | Tornado | Tornado | EF2 | $1.0M | — | — | — | County |
| 12 Mar 2006 | Tornado | Tornado | F1 | $750K | — | — | — | County |
| 30 May 1993 | Tornado | Tornado | F0 | $500K | — | — | — | County |
| 19 Apr 1995 | Thunderstorm Wind | Wind | 0 mph | $500K | — | — | — | County |
| 22 May 2019 | Tornado | Tornado | EF2 | $500K | — | — | — | County |
| 18 Apr 2013 | Tornado | Tornado | EF2 | $400K | — | — | — | County |
Ranked by deaths, then injuries, then NCEI's damage estimate. Deaths and injuries are NCEI counts (direct plus indirect); no personal details are recorded here.
Federal disaster declarations
| Declared | Number | Type | Incident | Title | Programs |
|---|---|---|---|---|---|
| 14 Jun 2024 | DR-4791 | Major disaster | Severe Storm | Severe Storms, Straight-Line Winds, Tornadoes, And Flooding | Individual assistance, Public assistance |
| 19 Jul 2023 | DR-4721 | Major disaster | Severe Storm | Severe Storms, Straight-Line Winds, And Tornadoes | Public assistance |
| 24 Feb 2021 | DR-4587 | Major disaster | Severe Ice Storm | Severe Winter Storms | Public assistance |
| 17 Feb 2021 | EM-3555 | Emergency | Severe Ice Storm | Severe Winter Storm | Public assistance |
| 5 Apr 2020 | DR-4530 | Major disaster | Biological | Covid-19 Pandemic | Individual assistance, Public assistance |
| 13 Mar 2020 | EM-3462 | Emergency | Biological | Covid-19 | Public assistance |
| 1 Jun 2019 | DR-4438 | Major disaster | Severe Storm | Severe Storms, Straight-Line Winds, Tornadoes, And Flooding | Individual assistance, Public assistance |
| 25 Jul 2017 | DR-4324 | Major disaster | Tornado | Severe Storms, Tornadoes, Straight-Line Winds, And Flooding | Public assistance |
| 26 May 2017 | DR-4315 | Major disaster | Severe Storm | Severe Storms, Tornadoes, And Flooding | Public assistance |
| 10 Feb 2016 | DR-4256 | Major disaster | Severe Storm | Severe Winter Storms And Flooding | Public assistance |
| 26 May 2015 | DR-4222 | Major disaster | Severe Storm | Severe Storms, Tornadoes, Straight-Line Winds, And Flooding | Individual assistance, Public assistance |
| 6 Jun 2011 | DR-1989 | Major disaster | Severe Storm | Severe Storms, Tornadoes, Straight-Line Winds, And Flooding | Individual assistance, Public assistance |
| 27 May 2011 | DR-1988 | Major disaster | Severe Storm | Severe Storms And Flooding | Public assistance |
| 2 Feb 2011 | EM-3316 | Emergency | Severe Storm | Severe Winter Storm | Public assistance |
| 5 Mar 2010 | DR-1883 | Major disaster | Severe Ice Storm | Severe Winter Storm | Public assistance |
| 25 Feb 2010 | DR-1876 | Major disaster | Severe Storm | Severe Winter Storm | Public assistance |
| 30 Jan 2010 | EM-3308 | Emergency | Severe Storm | Severe Winter Storm | Public assistance |
| 17 Feb 2009 | DR-1823 | Major disaster | Severe Storm | Severe Winter Storm | Public assistance |
| 9 May 2008 | DR-1754 | Major disaster | Flood | Severe Storms, Tornadoes, And Flooding | Public assistance |
| 18 Dec 2007 | DR-1735 | Major disaster | Severe Ice Storm | Severe Winter Storms | Public assistance |
| 10 Dec 2007 | EM-3280 | Emergency | Severe Ice Storm | Severe Winter Storms | Public assistance |
| 7 Jul 2007 | DR-1712 | Major disaster | Severe Storm | Severe Storms, Flooding, And Tornadoes | Individual assistance |
| 1 Feb 2007 | DR-1678 | Major disaster | Severe Storm | Severe Winter Storms | Public assistance |
| 14 Jan 2007 | EM-3272 | Emergency | Severe Ice Storm | Severe Winter Storms And Flooding | Public assistance |
| 13 Apr 2006 | DR-1637 | Major disaster | Severe Storm | Severe Storms And Tornadoes | Individual assistance |
| 10 Jan 2006 | DR-1623 | Major disaster | Fire | Extreme Wildfire Threat | Public assistance |
| 5 Sep 2005 | EM-3219 | Emergency | Hurricane | Hurricane Katrina Evacuation | Public assistance |
| 10 May 2003 | DR-1465 | Major disaster | Severe Storm | Severe Storms And Tornadoes | Individual assistance, Public assistance |
| 5 Jan 2001 | DR-1355 | Major disaster | Severe Ice Storm | Severe Winter Ice Storm | Individual assistance, Public assistance |
| 18 May 1990 | DR-866 | Major disaster | Severe Storm | Severe Storms, Tornadoes & Flooding | Individual assistance |
| 14 Oct 1986 | DR-778 | Major disaster | Flood | Severe Storms & Flooding | Individual assistance |
| 10 Jun 1974 | DR-441 | Major disaster | Flood | Severe Storms & Flooding | Individual assistance, Public assistance |
| 13 Jun 1973 | DR-392 | Major disaster | Severe Storm | Severe Storms, Flooding, & Tornadoes | Individual assistance, Public assistance |
Declarations in which FEMA designated this county, from the OpenFEMA Disaster Declarations Summaries (v2). DR: major disaster; EM: emergency; FM: fire management assistance. Programs show whether individual or public assistance was made available.
Flood insurance claims
| Year of loss | Claims | Paid claims | Amount paid | Average paid |
|---|---|---|---|---|
| 2025 | 1 | 1 | $26,953 | $26,953 |
| 2019 | 29 | 25 | $726,032 | $29,041 |
| 2017 | 7 | 6 | $139,449 | $23,242 |
| 2015 | 22 | 15 | $153,525 | $10,235 |
| 2013 | 1 | 1 | $23,269 | $23,269 |
| 2012 | 2 | 0 | $0 | — |
| 2011 | 20 | 15 | $312,248 | $20,817 |
| 2009 | 8 | 6 | $31,548 | $5,258 |
| 2008 | 6 | 5 | $131,333 | $26,267 |
| 2007 | 4 | 3 | $30,539 | $10,180 |
| 2004 | 5 | 4 | $45,736 | $11,434 |
| 2002 | 1 | 0 | $0 | — |
| 1999 | 2 | 2 | $7,259 | $3,629 |
| 1998 | 1 | 1 | $10,102 | $10,102 |
| 1995 | 1 | 1 | $33,297 | $33,297 |
| 1993 | 1 | 1 | $2,439 | $2,439 |
| 1990 | 3 | 3 | $16,104 | $5,368 |
| 1987 | 1 | 1 | $5,000 | $5,000 |
OpenFEMA NFIP claims (v3, as of 8 Sep 2026), aggregated by year of loss; amounts are building, contents and increased-cost-of-compliance payments as recorded. Repetitive-loss counts from the NFIP Multiple Loss Properties file (2 Aug 2026); policies in force from the NFIP Residential Penetration Rates file (3 Aug 2026).
National Risk Index
| Hazard (NRI) | Risk rating | Expected annual loss |
|---|---|---|
| Inland flooding | $17,270,473 | |
| Tornado | $3,540,504 | |
| Heat wave | $2,205,876 | |
| Ice storm | $1,788,313 | |
| Cold wave | $1,563,753 | |
| Strong wind | $1,265,418 | |
| Wildfire | $935,966 | |
| Hail | $381,889 | |
| Lightning | $319,975 | |
| Earthquake | $282,095 | |
| Drought | $227,620 | |
| Winter weather | $131,452 | |
| Hurricane | $26,960 | |
| Landslide | $5,633 |
FEMA National Risk Index, December 2025 release. Ratings are FEMA's relative comparison of counties; expected annual loss is FEMA's modelled estimate of average yearly building, population and agriculture loss. See how to read the NRI.
Hurricane and tropical storm passes
| Storm | Year | Closest approach | Max wind while within 100 mi |
|---|---|---|---|
| Ike | 2008 | 87 mi | 40 mph |
| Carla | 1961 | 68 mi | 40 mph |
| Unnamed Atlantic storm | 1902 | 44 mi | 40 mph |
HURDAT2 best-track positions at tropical-storm strength (34 kt) or more, measured from the county's Census centre point; through the 2025 season. Distance from a track is not the same as the extent of the storm's wind, rain or surge.
ZIP codes with flood claims
ZIP codes whose NFIP claims carry this county's code, with the number of claims. Five or more claims are needed for a ZIP page to be indexed.
Questions and answers
How often does it hail in Delaware County, OK?
NCEI records 261 hail events in Delaware County since 1950, in 43 different years; that is about 3.4 recorded events a year. 50 reports were golf-ball size (1.75 in) or larger.
Has Delaware County had a tornado?
Yes. NCEI records 66 tornadoes in Delaware County since 1950, 19 of them rated (E)F2 or stronger. Tornado deaths recorded: 0.
When was the last federal disaster declaration for Delaware County?
14 Jun 2024: Severe Storms, Straight-Line Winds, Tornadoes, And Flooding, a major disaster declaration for severe storm. The county appears in 33 declarations since 1953.
How many flood insurance claims have been filed in Delaware County, and how much was paid?
115 NFIP claims since 1978, 90 of them paid, for $1.7M in total. FEMA publishes these figures redacted and aggregated; individual properties are not identified.
Is Delaware County in the National Risk Index's high-risk band?
FEMA's National Risk Index (December 2025) rates the county "Relatively Moderate" for overall risk, "Relatively Low" for expected annual loss, "Very High" for social vulnerability and "Very Low" for community resilience. These ratings are FEMA's relative comparison across all US counties.
How does Delaware County compare with the rest of Oklahoma?
106.0 recorded events per 100 square miles against 120.9 statewide, and 2.8 NFIP claims per 1,000 residents against 3.3. The comparison table on this page shows each measure beside the state and national figures.
Provenance
Storm events: NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026 (public domain). Declarations: OpenFEMA DisasterDeclarationsSummaries v2, refreshed 29 Sep 2026. Flood claims: OpenFEMA NfipClaims v3 as of 8 Sep 2026; NfipMultipleLossProperties v1 (2 Aug 2026); NfipResidentialPenetrationRates v1 (3 Aug 2026). Risk index: FEMA National Risk Index, December 2025. Hurricane tracks: NHC HURDAT2 through 2025. Population and area: US Census Bureau, 2021 vintage. Built 30 Sep 2026; see the methodology and corrections pages. Hazard hubs: Hail · Tornado · Flood · Wind · Winter.