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2025 Annual Fire Report

Fires in Boulder, Colorado

In 2025, fire departments serving Boulder responded to 768 fire and hazmat incidents — from cooking fires to gas leaks to a single $750K building blaze. Here's the full picture.

Updated Sep 27, 2026 Grade A- Peak yr 2022 Boulder County 106,598 residents 5 reporting departments 3,955 5-yr
Total incidents
768
-10.4% vs 2024
Building fires
21
Residential 67% Other 33%
Property loss
$2.7M
$2.2M structure · $525K contents
Deaths & injuries
0 / 1
0 civilian deaths · 0 civ injuries · 1 firefighter injuries
01 The mix

What kinds of fires happen here?

Gas leak (natural gas or LPG) lead by count. Building fires lead by dollars. Together the top five categories make up about 51% of all calls.

768
Total Incidents
Gas leak (natural gas or LPG) 195 25.4%
Unauthorized burning 68 8.9%
Power line down 46 6.0%
Carbon monoxide incident 42 5.5%
Arcing, shorted electrical equipment 37 4.8%
All other categories 380 49.5%
02 Seasonality

When do fires happen?

Dec peaks. Oct dips. Watch for the typical fall climb starting in October.

Jan 52
Feb 64
Mar 68
Apr 50
May 58
Jun 71
Jul 66
Aug 60
Sep 55
Oct 19
Nov 75
Dec 130
Fewer
More
2b Five-year trend

Year over year in Boulder

3,955 incidents 2021–2025. Peak year was 2022. $44.5M cumulative property loss.

YearIncidentsYoY 
2021 801 —
2022 909 +13.5%
2023 620 -31.8%
2024 857 +38.2%
2025 768 -10.4%
03 Cause of ignition

What sparks building fires?

For the 21 building fires Boulder departments responded to in 2025, here's how they were classified once investigators were finished.

Unintentional
43%
31
Cause undetermined
19%
14
Intentional / arson
15%
11
Equipment / heat source failure
11%
8
Under investigation
8%
6
Act of nature (lightning)
4%
2
3b Where fires start

Where do fires start in Boulder?

NFIRS Area of Origin (AREA_ORIG) for the 540 building fires investigators classified across 2021–2025. The room or location where ignition occurred — kitchens, bedrooms, exterior, vehicle areas — tells you where to focus prevention.

#Area of originCountShare 
1 Outside area, other 87 16.1%
2 Undetermined 63 11.7%
3 Engine area, running gear, wheel area 45 8.3%
4 Open area - outside; included are farmland, field 38 7.0%
5 Other 33 6.1%
6 Courtyard, patio, porch, terrace 27 5.0%
7 Wildland, woods 27 5.0%
8 Cooking area, kitchen 25 4.6%
9 Highway, parking lot, street: on or near 23 4.3%
10 Chute/container - trash, rubbish, waste 17 3.1%
11 All other areas 155 28.7%
3c What ignited it

What actually ignited the fire?

NFIRS Heat Source (HEAT_SOURC) — the physical thing that started it. Spark or ember from operating equipment, an open flame, smoking materials, or hot embers from a fireplace are the leading culprits nationwide. Here's the Boulder mix.

#Heat sourceCountShare 
1 Undetermined 277 51.3%
2 Heat from powered equipment, other 34 6.3%
3 Hot or smoldering object, other 34 6.3%
4 Arcing 32 5.9%
5 Heat source: other 23 4.3%
6 Match 20 3.7%
7 Radiated, conducted heat from operating equipment 19 3.5%
8 Hot ember or ash 19 3.5%
9 Cigarette lighter 13 2.4%
10 Cigarette 12 2.2%
11 All other sources 57 10.6%
04 The biggest fires

8 fires · $1.9M in losses

Largest single-incident property losses reported by Boulder departments in 2025. These 8 fires alone account for 86% of the city's annual total.

# Property loss Type Severity Status
1 $750,000 Building fires Major Investigated
2 $300,000 Building fires Major Investigated
3 $250,000 Building fires Major Investigated
4 $200,000 Building fires Significant Investigated
5 $189,000 Building fires Significant Investigated
6 $100,000 Building fires Significant Investigated
7 $51,000 Passenger vehicle fire Significant Investigated
8 $50,000 Off-road vehicle or heavy equipment fire Significant Investigated
05 How Boulder compares

Boulder vs Colorado vs the nation

Per-capita rates let us compare apples to apples. Boulder sits below the national average for incidents per resident.

7.2
Incidents per 1,000 residents
Boulder
7.2
CO avg
8
US avg
7.48
0.2
Building fires per 1,000 residents
Boulder
0.2
CO avg
0.53
US avg
0.85
0
Civilian fire deaths per million
Boulder
0
CO avg
4.8
US avg
5.9
5b Who gets hurt

Casualty demographics in Boulder

83 fire-related casualties recorded in NFIRS Module 11 across the 2021–2025 window. Age, gender, and severity are coarse-binned — no individual identification possible.

AgeCount 
0-9 0
10-19 0
20-29 6
30-39 31
40-49 29
50-59 16
60-69 1
70-79 0
80+ 0
Civilian vs firefighter
Civilian 2 FF 81
Gender
M 78 F 5 Unk 0
Severity (1=minor → 5=fatal)
72
1
5
2
4
3
2
4
0
5
5c Wildfires nearby

Wildfires within 50 mi of Boulder

Top 25 wildfires (1992+) in the FPA-FOD ignitions database, scaled by acres. 220,607 acres burned in this 50-mile radius. Each dot is a fire — bigger dots burned more land.

50 mi radius
YearCauseAcresDistance 
2012 Natural 87,275 39.8 mi
2020 Missing data/not specified/undetermined 14,833 44.7 mi
2015 Missing data/not specified/undetermined 12,699 43.7 mi
1996 Recreation and ceremony 11,875 47.7 mi
2000 Smoking 10,800 43.0 mi
2000 Recreation and ceremony 10,599 29.4 mi
2020 Missing data/not specified/undetermined 10,106 11.2 mi
2004 Debris and open burning 8,908 44.7 mi
2012 Recreation and ceremony 7,685 48.4 mi
2010 Debris and open burning 6,382 7.5 mi
2011 Missing data/not specified/undetermined 5,200 26.1 mi
2002 Equipment and vehicle use 4,348 19.3 mi
5d Top ZIPs

Where in Boulder do fires concentrate?

Top 10 ZIP codes by NFIRS incident count across 2021–2025. Each ZIP has its own fire profile — dive in for neighborhood-level context.

#ZIP5-yr incidents 
1 80302 1,474
2 80301 720
3 80304 710
4 80303 625
5 80305 386
6 80310 19
7 80309 6
8 80466 5
9 80503 4
10 40304 1
5e Peer cities

Cities similar to Boulder

Six Colorado cities with population within ±25% of Boulder. Useful comparison targets — same state, similar size, different fire profile.

06 First responders

Who responds in Boulder?

5 departments report to NFIRS for incidents in Boulder.

BOULDER FIRERESCUE
1805 33RD ST
FDID 01315112 paid
NULLROCKY MTN FIRE DISTRICT Merged wMtn View FR
7700 BASELINE RD
FDID 0132724 paid · 15 volunteer
Boulder Rural Fire Rescue
6230 Lookout RD
FDID 0132118 paid · 10 volunteer
LEFTHAND FPD
900 Lefthand Canyon DR
FDID 013572 paid · 31 volunteer
BOULDER MTN FPD
1905 LINDEN DR
FDID 013751 paid · 53 volunteer
07 Stay prepared

Before the next Red Flag day.

A 30-minute weekend can cut your home's exposure substantially. These four checklists are a good starting point.

About this data

Numbers reflect incidents reported by participating fire departments to the National Fire Incident Reporting System (NFIRS) Public Data Release for calendar year 2025. NFIRS is voluntary — about 23,000 of roughly 30,000 US fire departments report — so totals are a strong indicator, not a complete census. Per-capita comparisons use 2023 ACS population estimates. Wildland fire data complements NFIRS with NIFC and USFS perimeters. Active-fire counts come from a dated NIFC snapshot, not a live feed.