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ZIP-level NFIRS data

Fires in ZIP 91773

ZIP 91773 recorded 107 fire and hazmat incidents in 2025, 423 across 2021–2025. Primary county: Los Angeles County, CA. FEMA NRI rates wildfire risk here as Very High.

ZIP 91773 FIPS 06037 ZIP-level
Total incidents (2025)
107
423 across 5 years
Building fires
6
9 wildland
Wildfire risk
100
FEMA NRI · Very High
Active fires
0
in Los Angeles County
01 Five-year trend

Year over year in ZIP 91773

423 incidents from 2021 through 2025 inside this ZIP.

YearIncidents 
2021 65
2022 80
2023 92
2024 79
2025 107
02 Seasonality

When do fires happen in ZIP 91773?

Jul peaks. Mar dips. Aggregated across all 5 years inside this ZIP.

Jan 43
Feb 28
Mar 19
Apr 29
May 42
Jun 33
Jul 58
Aug 39
Sep 35
Oct 24
Nov 40
Dec 33
03 Top incident types

What kinds of calls lead in ZIP 91773?

Top 5 NFIRS incident types for ZIP 91773 across 2021–2025.

#Incident typeCountShare 
1 Power line down 43 10.2%
2 Outside rubbish, trash or waste fire 37 8.7%
3 Outside rubbish fire, other 32 7.6%
4 Building fires 28 6.6%
5 Mobile property (vehicle) fire, other 27 6.4%
04 Cause of ignition

What sparks fires in ZIP 91773?

For the 6 building fires reported here in 2025, here's how investigators classified ignition cause.

Unintentional
55%
64
Cause undetermined
10%
12
Intentional / arson
9%
11
Equipment / heat source failure
14%
16
Under investigation
11%
13
Act of nature (lightning)
1%
0
05 Where fires start

Where in the building fires start

NFIRS Area of Origin for ZIP 91773 fires across 2021–2025.

#Area of originCountShare 
1 Engine area, running gear, wheel area 35 30.2%
2 Outside area, other 13 11.2%
3 Undetermined 12 10.3%
4 Cargo/trunk area - all vehicles 7 6.0%
5 Other 6 5.2%
6 Vehicle storage area; garage, carport 5 4.3%
7 Bathroom, checkroom, lavatory, locker room 4 3.4%
8 Vehicle area, other 4 3.4%
9 All other areas 30 25.9%
06 What ignited it

The leading heat sources here

NFIRS HEAT_SOURC code — the physical thing that started the fire.

#Heat sourceCountShare 
1 Heat source: other 20 17.2%
2 Arcing 19 16.4%
3 Undetermined 19 16.4%
4 Heat from powered equipment, other 17 14.7%
5 Hot or smoldering object, other 14 12.1%
6 Radiated, conducted heat from operating equipment 7 6.0%
7 Spark, ember or flame from operating equipment 3 2.6%
8 Hot ember or ash 3 2.6%
9 All other sources 14 12.1%
07 The biggest fires

8 fires · $2.3M in losses

Largest single-incident losses in ZIP 91773 across 2021–2025. These 8 fires alone account for 158% of the ZIP's 2025 reported total.

#Property lossTypeYearSeverity
1 $800,000 Road freight or transport vehicle fire 2025 Major
2 $300,000 Building fires 2021 Major
3 $300,000 Fires in structures other than in a building 2025 Major
4 $250,000 Building fires 2022 Major
5 $200,000 Road freight or transport vehicle fire 2022 Significant
6 $150,000 Mobile property (vehicle) fire, other 2022 Significant
7 $150,000 Building fires 2022 Significant
8 $150,000 Building fires 2025 Significant
08 Cities in this ZIP

Most active cities in ZIP 91773

Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 91773.

#City5-yr incidents 
1 San Dimas 399
2 Pomona 11
3 Glendora 9
4 La Verne 2
5 Claremont 1
11 Current conditions

Right now in 91773

The figures above are historical. For today's air quality, fire-weather warnings, and active fires, go to the official sources.

About ZIP-level data

NFIRS reports each fire incident with a 5-digit address ZIP. We aggregate those rows directly to produce ZIP-level totals — 423 incidents in this ZIP across 2021–2025. Building-fire breakdowns (Area of Origin, Heat Source, ignition cause) only count fires investigators classified beyond the basic incident report. Because NFIRS reporting is voluntary, totals are a strong indicator rather than a complete census.