Broomfield County, Colorado: Natural Disaster Risk and History
Broomfield County, Colorado has a Very Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 34.7 out of 100, higher than about 34% of US counties, with hail, lightning and winter storms scoring highest of its 18 hazards and $17 million a year in expected losses.
OpenFEMA lists 4 federal disaster declarations that included Broomfield County since 2003, not counting 2 for COVID-19; the latest is EM-3365-CO (Severe Storms, Flooding, Landslides, and Mudslides, declared 12 September 2013). NOAA's Storm Prediction Center has no tornado on record touching Broomfield County from 1950 to 2025.
Live weather alerts for Colorado All official warnings Latest FEMA declarations
Population 74,051 Buildings worth $16 billion Area 34 sq mi Risk rank in Colorado 35 of 64 FIPS 08014
All 18 hazards, highest risk first
FEMA National Risk Index| Hazard | Risk rating | Score | Expected loss a year | How often | Events in record |
|---|---|---|---|---|---|
| Hail | Relatively Moderate | 91.4 | $3.0 million | about 6.3 a year | 238 |
| Lightning | Relatively High | 86.2 | $1.5 million | about 47 a year | 55,211 strikes |
| Winter weather | Relatively Moderate | 74.7 | $252,465 | about 14 a year | 267 |
| Wildfire | Relatively Low | 72.4 | $324,866 | rarer than once in 1,000 years | — |
| Tornado | Relatively Low | 61.9 | $2.9 million | about once every 33 years | 5 |
| Strong wind | Relatively Moderate | 56.3 | $1.0 million | about 1.2 a year | 45 |
| Cold wave | Relatively Low | 50.4 | $1.5 million | about 1.2 a year | 23 |
| Volcanic activity | Very Low | 48.9 | $18 | rarer than once in 1,000 years | 1 |
| Earthquake | Very Low | 48.0 | $381,412 | rarer than once in 1,000 years | — |
| Ice storm | Relatively Low | 40.8 | $84,287 | about once every 67 years | 0 |
| Inland flooding | Very Low | 33.1 | $5.9 million | about once every 14 years | 2 |
| Heat wave | Very Low | 30.5 | $215,251 | about once every 1.1 years | 12 |
| Drought | Very Low | 15.1 | $1,012 | about 11 a year | 406 |
| Landslide | Very Low | 6.2 | $17 | about once every 106 years | — |
| Avalanche | Not Applicable | — | — | — | — |
| Coastal flooding | Not Applicable | — | — | — | — |
| Hurricane | Not Applicable | — | — | — | — |
| Tsunami | 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 4
Most common: Snowstorm 2, Flood 1, Coastal Storm 1.
| Decade | Declarations | Incident types |
|---|---|---|
| 2000s | 3 | Snowstorm ×2, Coastal Storm |
| 2010s | 1 | Flood |
The last 4
Widest declarations that included Broomfield County
- Hurricane Katrina Evacuation (2005, EM-3224-CO): 64 Colorado counties designated.
- Snow (2003, EM-3185-CO): 29 Colorado counties designated.
- Snow (2007, EM-3270-CO): 16 Colorado 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. Colorado also had 12 statewide declarations with no county list.
Tornado record since 1950 0
No tornado in NOAA's Storm Prediction Center record touched Broomfield County between 1950 and 2025. That does not mean one cannot happen.
How Broomfield County compares with its 5 nearest counties
| County | Distance | Overall risk | Score | Top hazard |
|---|---|---|---|---|
| Broomfield County (this page) | — | Very Low | 34.7 | Hail |
| Denver County | 26 km | Relatively High | 95.2 | Hail |
| Boulder County | 30 km | Relatively Moderate | 90.7 | Lightning |
| Gilpin County | 42 km | Very Low | 6.4 | Wildfire |
| Jefferson County | 44 km | Relatively High | 94.9 | Hail |
| Clear Creek County | 58 km | Relatively Low | 46.7 | Avalanche |
Nearest by distance between county centres. Every county in Colorado, ranked.
Vulnerability and resilience
| Social vulnerability | Very Low 10.6 |
|---|---|
| Community resilience | Very High 81.9 |
| Community risk factor | 0.68 |
| Expected annual loss, all hazards | $17 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 Broomfield County's main hazards
- Right now: National Weather Service alerts for Colorado · all official warnings on Global Incident Tracker.
- Hail: Weather alerts for Colorado
- Lightning: Weather alerts for Colorado
- Winter weather: Power outages now · Carbon monoxide in winter
- 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 Broomfield County
What natural disasters is Broomfield County, Colorado most at risk from?
Broomfield County, Colorado has a Very Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 34.7 out of 100, higher than about 34% of US counties, with hail, lightning and winter storms scoring highest of its 18 hazards and $17 million a year in expected losses.
How many federal disaster declarations has Broomfield County had?
OpenFEMA lists 4 federal disaster declarations that included Broomfield County since 2003, not counting 2 for COVID-19; the latest is EM-3365-CO (Severe Storms, Flooding, Landslides, and Mudslides, declared 12 September 2013). Another 12 Colorado declarations were made statewide without a county list.
How many tornadoes have hit Broomfield County?
NOAA's Storm Prediction Center has no tornado on record touching Broomfield County from 1950 to 2025.
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.