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2025 Annual Fire Report

Fires in Aliso Viejo, California

In 2025, fire departments serving Aliso Viejo responded to 40 fire and hazmat incidents — from cooking fires to gas leaks to a single $10K building blaze. Here's the full picture.

Updated Sep 27, 2026 Grade A- Peak yr 2021 Orange County 51,896 residents 0 reporting departments 283 5-yr
Total incidents
40
-34.4% vs 2024
Building fires
6
Residential 67% Other 33%
Property loss
$13K
$12K structure · $700 contents
Deaths & injuries
0 / 0
0 civilian deaths · 0 civ injuries · 0 firefighter injuries
01 The mix

What kinds of fires happen here?

Passenger vehicle fire lead by count. Building fires lead by dollars. Together the top five categories make up about 63% of all calls.

40
Total Incidents
Passenger vehicle fire 7 17.5%
Building fires 6 15.0%
Hazardous condition, other 5 12.5%
Gas leak (natural gas or LPG) 4 10.0%
Arcing, shorted electrical equipment 3 7.5%
All other categories 15 37.5%
02 Seasonality

When do fires happen?

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

Jan 8
Feb 4
Mar 4
Apr 4
May 1
Jun 1
Jul 2
Aug 7
Sep 1
Oct 3
Nov 5
Dec 0
Fewer
More
2b Five-year trend

Year over year in Aliso Viejo

283 incidents 2021–2025. Peak year was 2021. $1.8M cumulative property loss. 1 civilian deaths.

YearIncidentsYoY 
2021 75 —
2022 55 -26.7%
2023 52 -5.5%
2024 61 +17.3%
2025 40 -34.4%
03 Cause of ignition

What sparks building fires?

For the 6 building fires Aliso Viejo departments responded to in 2025, here's how they were classified once investigators were finished.

Unintentional
48%
10
Cause undetermined
29%
6
Intentional / arson
0%
0
Equipment / heat source failure
24%
5
Under investigation
0%
0
Act of nature (lightning)
-1%
0
3b Where fires start

Where do fires start in Aliso Viejo?

NFIRS Area of Origin (AREA_ORIG) for the 148 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 Cooking area, kitchen 23 15.5%
2 Engine area, running gear, wheel area 21 14.2%
3 Highway, parking lot, street: on or near 11 7.4%
4 Other 10 6.8%
5 Bathroom, checkroom, lavatory, locker room 7 4.7%
6 Courtyard, patio, porch, terrace 7 4.7%
7 Undetermined 6 4.1%
8 Vehicle storage area; garage, carport 5 3.4%
9 Operator/passenger area of transportation equip. 5 3.4%
10 Open area - outside; included are farmland, field 5 3.4%
11 All other areas 48 32.4%
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 Aliso Viejo mix.

#Heat sourceCountShare 
1 Undetermined 45 30.4%
2 Radiated, conducted heat from operating equipment 19 12.8%
3 Heat source: other 13 8.8%
4 Arcing 11 7.4%
5 Heat from powered equipment, other 10 6.8%
6 Hot or smoldering object, other 9 6.1%
7 Hot ember or ash 5 3.4%
8 Heat from other open flame or smoking materials 5 3.4%
9 Spark, ember or flame from operating equipment 4 2.7%
10 Cigarette lighter 4 2.7%
11 All other sources 23 15.5%
04 The biggest fires

2 fires · $12K in losses

Largest single-incident property losses reported by Aliso Viejo departments in 2025. These 2 fires alone account for 100% of the city's annual total.

# Property loss Type Severity Status
1 $10,000 Passenger vehicle fire Significant Investigated
2 $2,000 Building fires Significant Investigated
05 How Aliso Viejo compares

Aliso Viejo vs California vs the nation

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

0.77
Incidents per 1,000 residents
Aliso Viejo
0.77
CA avg
5.32
US avg
7.48
0.12
Building fires per 1,000 residents
Aliso Viejo
0.12
CA avg
0.32
US avg
0.85
0
Civilian fire deaths per million
Aliso Viejo
0
CA avg
2.9
US avg
5.9
5b Who gets hurt

Casualty demographics in Aliso Viejo

5 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 0
30-39 0
40-49 1
50-59 1
60-69 3
70-79 0
80+ 0
Civilian vs firefighter
Civilian 4 FF 1
Gender
M 3 F 2 Unk 0
Severity (1=minor → 5=fatal)
2
1
2
2
0
3
0
4
1
5
5c Wildfires nearby

Wildfires within 50 mi of Aliso Viejo

Top 25 wildfires (1992+) in the FPA-FOD ignitions database, scaled by acres. 683,642 acres burned in this 50-mile radius. Each dot is a fire — bigger dots burned more land.

50 mi radius
YearCauseAcresDistance 
2020 Missing data/not specified/undetermined 115,997 48.1 mi
2003 Arson/incendiarism 91,281 50.0 mi
2003 Arson/incendiarism 59,788 43.1 mi
2002 Arson/incendiarism 37,240 45.1 mi
2016 Missing data/not specified/undetermined 36,274 49.6 mi
2008 Missing data/not specified/undetermined 30,305 20.3 mi
2007 Missing data/not specified/undetermined 28,476 12.1 mi
1993 Power generation/transmission/distribution 24,387 41.6 mi
2018 Missing data/not specified/undetermined 23,025 14.1 mi
2018 Missing data/not specified/undetermined 22,000 42.1 mi
1993 Missing data/not specified/undetermined 21,384 15.7 mi
2007 Missing data/not specified/undetermined 21,004 18.7 mi
5d Top ZIPs

Where in Aliso Viejo do fires concentrate?

Top 4 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 92656 279
2 92637 2
3 92651 1
4 92653 1
5e Peer cities

Cities similar to Aliso Viejo

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

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.