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2025 Annual Fire Report

Fires in Ontario, Oregon

In 2025, fire departments serving Ontario responded to 207 fire and hazmat incidents — from cooking fires to gas leaks to a single $40K building blaze. Here's the full picture.

Updated Sep 27, 2026 Grade B Peak yr 2024 Malheur County 11,610 residents 0 reporting departments 857 5-yr
Total incidents
207
-2.8% vs 2024
Building fires
35
Residential 66% Other 34%
Property loss
$101K
$80K structure · $21K contents
Deaths & injuries
0 / 0
0 civilian deaths · 0 civ injuries · 0 firefighter injuries
01 The mix

What kinds of fires happen here?

Building fires lead by count. Building fires lead by dollars. Together the top five categories make up about 49% of all calls.

207
Total Incidents
Building fires 35 16.9%
Attempted burning, illegal action, other 18 8.7%
Unauthorized burning 17 8.2%
Brush, or brush and grass mixture fire 16 7.7%
Outside rubbish fire, other 15 7.2%
All other categories 106 51.2%
02 Seasonality

When do fires happen?

Jun peaks. Feb dips. Watch for the typical fall climb starting in October.

Jan 15
Feb 4
Mar 16
Apr 20
May 22
Jun 35
Jul 33
Aug 14
Sep 15
Oct 13
Nov 10
Dec 10
Fewer
More
2b Five-year trend

Year over year in Ontario

857 incidents 2021–2025. Peak year was 2024. $370K cumulative property loss.

YearIncidentsYoY 
2021 116 —
2022 156 +34.5%
2023 165 +5.8%
2024 213 +29.1%
2025 207 -2.8%
03 Cause of ignition

What sparks building fires?

For the 35 building fires Ontario departments responded to in 2025, here's how they were classified once investigators were finished.

Unintentional
28%
30
Cause undetermined
26%
28
Intentional / arson
29%
31
Equipment / heat source failure
5%
5
Under investigation
9%
10
Act of nature (lightning)
3%
2
3b Where fires start

Where do fires start in Ontario?

NFIRS Area of Origin (AREA_ORIG) for the 457 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 156 34.1%
2 Undetermined 53 11.6%
3 Other 46 10.1%
4 Open area - outside; included are farmland, field 44 9.6%
5 Engine area, running gear, wheel area 34 7.4%
6 Highway, parking lot, street: on or near 20 4.4%
7 Cooking area, kitchen 13 2.8%
8 Attic: vacant, crawl space above top story, cupola 7 1.5%
9 Vehicle area, other 7 1.5%
10 Function area, other 6 1.3%
11 All other areas 71 15.5%
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 Ontario mix.

#Heat sourceCountShare 
1 Undetermined 172 37.6%
2 Heat source: other 87 19.0%
3 Arcing 32 7.0%
4 Heat from powered equipment, other 24 5.3%
5 Hot or smoldering object, other 18 3.9%
6 Hot ember or ash 16 3.5%
7 Heat from other open flame or smoking materials 15 3.3%
8 Cigarette lighter 11 2.4%
9 Match 10 2.2%
10 Fireworks 8 1.8%
11 All other sources 64 14.0%
04 The biggest fires

3 fires · $80K in losses

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

# Property loss Type Severity Status
1 $40,000 Outside storage fire Significant Investigated
2 $20,000 Special outside fire, other Significant Investigated
3 $20,000 Off-road vehicle or heavy equipment fire Significant Investigated
05 How Ontario compares

Ontario vs Oregon vs the nation

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

17.83
Incidents per 1,000 residents
Ontario
17.83
OR avg
8.47
US avg
7.48
3.01
Building fires per 1,000 residents
Ontario
3.01
OR avg
0.83
US avg
0.85
0
Civilian fire deaths per million
Ontario
0
OR avg
3.8
US avg
5.9
5c Wildfires nearby

Wildfires within 50 mi of Ontario

Top 25 wildfires (1992+) in the FPA-FOD ignitions database, scaled by acres. 674,523 acres burned in this 50-mile radius. Each dot is a fire — bigger dots burned more land.

50 mi radius
YearCauseAcresDistance 
2000 Natural 79,914 20.4 mi
2006 Natural 54,350 34.2 mi
2015 Natural 49,100 46.7 mi
2020 Equipment and vehicle use 48,435 48.1 mi
2013 Natural 46,444 30.2 mi
2002 Natural 42,543 39.1 mi
2016 Missing data/not specified/undetermined 35,194 36.5 mi
2002 Natural 32,812 45.1 mi
1996 Natural 31,295 18.9 mi
2005 Natural 25,280 36.2 mi
2007 Natural 24,900 47.7 mi
2007 Natural 23,760 25.1 mi
5d Top ZIPs

Where in Ontario do fires concentrate?

Top 1 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 97914 857
5e Peer cities

Cities similar to Ontario

Six Oregon cities with population within ±25% of Ontario. 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.