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2025 Annual Fire Report

Fires in Mariposa, California

In 2025, fire departments serving Mariposa responded to 17 fire and hazmat incidents — from cooking fires to gas leaks to a single $350K building blaze. Here's the full picture.

Updated Sep 27, 2026 Grade B- Peak yr 2022 Mariposa County 1,060 residents 0 reporting departments 84 5-yr
Total incidents
17
-29.2% vs 2024
Building fires
3
Residential 67% Other 33%
Property loss
$427K
$352K structure · $75K contents
Deaths & injuries
0 / 0
0 civilian deaths · 0 civ injuries · 0 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 65% of all calls.

17
Total Incidents
Gas leak (natural gas or LPG) 4 23.5%
Building fires 3 17.6%
Heat from short circuit (wiring), defective/worn 2 11.8%
Fires in structures other than in a building 1 5.9%
Cooking fire, confined to container 1 5.9%
All other categories 6 35.3%
02 Seasonality

When do fires happen?

Apr peaks. Mar dips. Watch for the typical fall climb starting in October.

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

Year over year in Mariposa

84 incidents 2021–2025. Peak year was 2022. $353K cumulative property loss.

YearIncidentsYoY 
2021 15 —
2022 28 +86.7%
2023* 0 —
2024 24 —
2025 17 -29.2%

* Well below Mariposa's usual volume. That almost always means one or more departments didn't submit a full year to NFIRS, not that fires dropped, so no year-over-year change is shown for it.

03 Cause of ignition

What sparks building fires?

For the 3 building fires Mariposa departments responded to in 2025, here's how they were classified once investigators were finished.

Unintentional
25%
1
Cause undetermined
50%
2
Intentional / arson
0%
0
Equipment / heat source failure
25%
1
Under investigation
0%
0
Act of nature (lightning)
0%
0
3b Where fires start

Where do fires start in Mariposa?

NFIRS Area of Origin (AREA_ORIG) for the 8 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 Undetermined 3 37.5%
2 Common room, den, family room, living room, lounge 1 12.5%
3 Bedroom - < 5 persons; included are jail or prison 1 12.5%
4 Cooking area, kitchen 1 12.5%
5 Ceiling & floor assembly, crawl space b/t stories 1 12.5%
6 Wall assembly 1 12.5%
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 Mariposa mix.

#Heat sourceCountShare 
1 Undetermined 4 50.0%
2 Arcing 2 25.0%
3 Heat from powered equipment, other 1 12.5%
4 Hot or smoldering object, other 1 12.5%
04 The biggest fires

3 fires · $352K in losses

Largest single-incident property losses reported by Mariposa departments in 2025. These 3 fires alone account for 100% of the city's annual total.

# Property loss Type Severity Status
1 $350,000 Building fires Major Investigated
2 $1,500 Brush, or brush and grass mixture fire Significant Investigated
3 $100 Building fires Significant Investigated
05 How Mariposa compares

Mariposa vs California vs the nation

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

16.04
Incidents per 1,000 residents
Mariposa
16.04
CA avg
5.32
US avg
7.48
2.83
Building fires per 1,000 residents
Mariposa
2.83
CA avg
0.32
US avg
0.85
0
Civilian fire deaths per million
Mariposa
0
CA avg
2.9
US avg
5.9
5b Who gets hurt

Casualty demographics in Mariposa

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

Wildfires within 50 mi of Mariposa

Top 25 wildfires (1992+) in the FPA-FOD ignitions database, scaled by acres. 1,098,703 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 379,895 43.4 mi
2013 Missing data/not specified/undetermined 255,858 26.2 mi
2018 Missing data/not specified/undetermined 96,953 12.2 mi
2017 Firearms and explosives use 81,826 16.0 mi
2008 Missing data/not specified/undetermined 34,091 5.4 mi
2006 Equipment and vehicle use 25,000 36.2 mi
2013 Natural 22,992 38.8 mi
1996 Natural 22,080 29.6 mi
2001 Missing data/not specified/undetermined 14,280 49.5 mi
2014 Recreation and ceremony 13,837 37.9 mi
2016 Arson/incendiarism 13,349 40.9 mi
2018 Natural 12,990 46.6 mi
5d Top ZIPs

Where in Mariposa do fires concentrate?

Top 3 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 95338 82
2 95050 1
3 95220 1
5e Peer cities

Cities similar to Mariposa

Six California cities with population within ±25% of Mariposa. 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.