States › Colorado › Arapahoe County
Arapahoe County, Colorado
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 1 Oct 2026; NFIP claims as of 8 Sep 2026.
The NCEI record lists 927 events for Arapahoe County, Colorado, between 1950 and 2026; hail account for the largest share.
That is 116.2 events per 100 square miles, above the Colorado figure of 49.4, and 14.2 per 10,000 residents against 88.1 statewide.
23 events fall in the 12 months to 30 Jun 2026. NCEI attributes 2 deaths and 26 injuries to events in the county, with property damage estimated at $1.1B and crop damage at $98K.
FEMA has designated the county in 12 federal disaster declarations since 1953; the most recent is Severe Storms, Flooding, And Tornadoes (major disaster, 25 Aug 2023).
National Flood Insurance Program policyholders in the county filed 207 claims since 1978, of which 105 were paid, totalling $1.0M (about $10K per paid claim). FEMA counts 677 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 Moderate" ($172M a year across 18 hazards).
Compared with Colorado and the United States
| Measure | Arapahoe County | Colorado | US |
|---|---|---|---|
| Recorded events since 1950 | 927 | 51,187 | 1,977,440 |
| Events per 100 square miles | 116.2 | 49.4 | 56.0 |
| Events per 10,000 residents | 14.2 | 88.1 | 59.6 |
| Events in the last 12 months | 23 | 1,519 | 62,008 |
| Deaths recorded by NCEI | 2 | 322 | 26,435 |
| Property damage (NCEI estimates) | $1.1B | $11B | $575B |
| NFIP claims per 1,000 residents | 0.3 | 1.0 | 8.1 |
| Average paid NFIP claim | $10K | $25K | $43K |
| Claims per 100 policies in force, last 10 years | 8.3 | 4.4 | 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: 488 events in the 20 years to 2025 against 300 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 |
|---|---|---|---|---|---|---|---|---|
| 24 Jul 2018 | Flash Flood | Flood | — | $500K | — | 1 | — | County |
| 21 Jun 2023 | Flash Flood | Flood | — | $50K | — | 1 | — | County |
| 19 Jun 2018 | Hail | Hail | 3.00 in | $276M | — | — | — | County |
| 29 Sep 2014 | Hail | Hail | 1.75 in | $213M | — | — | — | County |
| 7 Jun 2012 | Hail | Hail | 2.50 in | $161M | — | — | — | County |
| 7 Jun 2009 | Hail | Hail | 3.00 in | $161M | — | — | — | County |
| 6 Jun 2012 | Hail | Hail | 1.00 in | $160M | — | — | — | County |
| 16 Oct 1998 | Hail | Hail | 2.00 in | $88M | — | — | — | County |
| 3 Jul 2009 | Lightning | Lightning | — | — | — | — | 6 | County |
| 10 Aug 1996 | Thunderstorm Wind | Wind | — | — | — | — | 5 | County |
| 7 Jun 2009 | Tornado | Tornado | EF1 | $500K | — | — | 2 | County |
| 8 Jul 2001 | Thunderstorm Wind | Wind | 58 mph | — | — | — | 2 | County |
| 29 Jun 2011 | Lightning | Lightning | — | — | — | — | 2 | County |
| 29 Aug 2002 | Tornado | Tornado | F1 | $6.0M | — | — | 1 | County |
| 27 Jul 2018 | Tornado | Tornado | EF1 | $200K | — | — | 1 | County |
| 14 Jul 2011 | Flash Flood | Flood | — | $10K | — | — | 1 | County |
| 25 Jul 1998 | Lightning | Lightning | — | — | — | — | 1 | County |
| 28 Apr 2001 | Lightning | Lightning | — | — | — | — | 1 | County |
| 9 Sep 2009 | Lightning | Lightning | — | — | — | — | 1 | County |
| 16 Aug 2010 | Lightning | Lightning | — | — | — | — | 1 | 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 |
|---|---|---|---|---|---|
| 25 Aug 2023 | DR-4731 | Major disaster | Flood | Severe Storms, Flooding, And Tornadoes | Public assistance |
| 28 Mar 2020 | DR-4498 | Major disaster | Biological | Covid-19 Pandemic | Individual assistance, Public assistance |
| 13 Mar 2020 | EM-3436 | Emergency | Biological | Covid-19 | Public assistance |
| 14 Sep 2013 | DR-4145 | Major disaster | Flood | Severe Storms, Flooding, Landslides, And Mudslides | Individual assistance, Public assistance |
| 12 Sep 2013 | EM-3365 | Emergency | Flood | Severe Storms, Flooding, Landslides, And Mudslides | Public assistance |
| 7 Jan 2007 | EM-3270 | Emergency | Snowstorm | Snow | Public assistance |
| 5 Sep 2005 | EM-3224 | Emergency | Coastal Storm | Hurricane Katrina Evacuation | Public assistance |
| 9 Apr 2003 | EM-3185 | Emergency | Snowstorm | Snow | Public assistance |
| 19 Jun 2002 | DR-1421 | Major disaster | Fire | Wildfires | Individual assistance |
| 23 May 1973 | DR-385 | Major disaster | Flood | Heavy Rains, Snowmelt And Flooding | Individual assistance, Public assistance |
| 19 May 1969 | DR-261 | Major disaster | Flood | Severe Storms & Flooding | Individual assistance, Public assistance |
| 19 Jun 1965 | DR-200 | Major disaster | Tornado | Tornadoes, Severe Storms & Flooding | 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 |
|---|---|---|---|---|
| 2026 | 3 | 0 | $0 | — |
| 2025 | 1 | 0 | $0 | — |
| 2024 | 3 | 1 | $13,948 | $13,948 |
| 2023 | 31 | 20 | $142,974 | $7,149 |
| 2022 | 1 | 1 | $19,504 | $19,504 |
| 2021 | 9 | 2 | $13,500 | $6,750 |
| 2020 | 1 | 0 | $0 | — |
| 2019 | 3 | 1 | $1,950 | $1,950 |
| 2018 | 3 | 1 | $1,492 | $1,492 |
| 2017 | 1 | 0 | $0 | — |
| 2016 | 3 | 1 | $3,942 | $3,942 |
| 2015 | 26 | 18 | $411,872 | $22,882 |
| 2014 | 6 | 1 | $1,548 | $1,548 |
| 2013 | 36 | 24 | $257,818 | $10,742 |
| 2012 | 2 | 0 | $0 | — |
| 2011 | 5 | 1 | $34 | $34 |
| 2010 | 1 | 1 | $2,432 | $2,432 |
| 2008 | 1 | 0 | $0 | — |
| 2007 | 1 | 1 | $2,589 | $2,589 |
| 2006 | 2 | 0 | $0 | — |
| 2003 | 1 | 0 | $0 | — |
| 2001 | 14 | 7 | $20,257 | $2,894 |
| 2000 | 5 | 2 | $8,442 | $4,221 |
| 1999 | 5 | 1 | $2,678 | $2,678 |
| 1998 | 2 | 1 | $1,080 | $1,080 |
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 |
|---|---|---|
| Hail | $63,981,567 | |
| Inland flooding | $62,030,206 | |
| Tornado | $22,358,910 | |
| Cold wave | $9,397,299 | |
| Lightning | $4,026,802 | |
| Strong wind | $3,717,697 | |
| Earthquake | $3,521,407 | |
| Heat wave | $1,025,157 | |
| Wildfire | $802,120 | |
| Winter weather | $518,786 | |
| Drought | $117,648 | |
| Ice storm | $7,305 | |
| Landslide | $1,652 | |
| Volcanic activity | $155 |
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
No HURDAT2 track at tropical-storm strength passes within 100 miles of the county's centre point (through the 2025 season).
ZIP codes with flood claims
- 80111 32
- 80012 19
- 80120 19
- 80113 18
- 80122 16
- 80123 16
- 80016 15
- 80013 12
- 80112 12
- 80222 12
- 80014 9
- 80110 8
- 80121 7
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 Arapahoe County, CO?
NCEI records 601 hail events in Arapahoe County since 1950, in 59 different years; that is about 7.8 recorded events a year. 124 reports were golf-ball size (1.75 in) or larger.
Has Arapahoe County had a tornado?
Yes. NCEI records 100 tornadoes in Arapahoe County since 1950, 2 of them rated (E)F2 or stronger. Tornado deaths recorded: 0.
When was the last federal disaster declaration for Arapahoe County?
25 Aug 2023: Severe Storms, Flooding, And Tornadoes, a major disaster declaration for flood. The county appears in 12 declarations since 1953.
How many flood insurance claims have been filed in Arapahoe County, and how much was paid?
207 NFIP claims since 1978, 105 of them paid, for $1.0M in total. FEMA publishes these figures redacted and aggregated; individual properties are not identified.
Is Arapahoe 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 Moderate" for expected annual loss, "Very Low" for social vulnerability and "Relatively Moderate" for community resilience. These ratings are FEMA's relative comparison across all US counties.
How does Arapahoe County compare with the rest of Colorado?
116.2 recorded events per 100 square miles against 49.4 statewide, and 0.3 NFIP claims per 1,000 residents against 1.0. 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 1 Oct 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 1 Oct 2026; see the methodology and corrections pages. Hazard hubs: Hail · Tornado · Flood · Wind · Winter.