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ZIP-level NFIRS data

Fires in ZIP 53058

ZIP 53058 recorded 17 fire and hazmat incidents in 2025, 92 across 2021–2025. Primary county: Waukesha County, WI. FEMA NRI rates wildfire risk here as Moderate.

ZIP 53058 FIPS 55133 ZIP-level
Total incidents (2025)
17
92 across 5 years
Building fires
0
2 wildland
Wildfire risk
50
FEMA NRI · Moderate
Active fires
0
in Waukesha County
01 Five-year trend

Year over year in ZIP 53058

92 incidents from 2021 through 2025 inside this ZIP.

YearIncidents 
2021 22
2022 14
2023 21
2024 18
2025 17
02 Seasonality

When do fires happen in ZIP 53058?

Aug peaks. Feb dips. Aggregated across all 5 years inside this ZIP.

Jan 1
Feb 0
Mar 9
Apr 4
May 7
Jun 7
Jul 7
Aug 17
Sep 17
Oct 7
Nov 11
Dec 5
03 Top incident types

What kinds of calls lead in ZIP 53058?

Top 5 NFIRS incident types for ZIP 53058 across 2021–2025.

#Incident typeCountShare 
1 Building fires 14 15.2%
2 Gas leak (natural gas or LPG) 13 14.1%
3 Power line down 13 14.1%
4 Electrical wiring/equipment problem, other 9 9.8%
5 Brush, or brush and grass mixture fire 7 7.6%
04 Cause of ignition

What sparks fires in ZIP 53058?

For the 0 building fires reported here in 2025, here's how investigators classified ignition cause.

Unintentional
33%
5
Cause undetermined
20%
3
Intentional / arson
20%
3
Equipment / heat source failure
7%
1
Under investigation
7%
1
Act of nature (lightning)
13%
2
05 Where fires start

Where in the building fires start

NFIRS Area of Origin for ZIP 53058 fires across 2021–2025.

#Area of originCountShare 
1 Open area - outside; included are farmland, field 7 46.7%
2 Wildland, woods 2 13.3%
3 Undetermined 2 13.3%
4 Operator/passenger area of transportation equip. 1 6.7%
5 Engine area, running gear, wheel area 1 6.7%
6 Outside area, other 1 6.7%
7 Courtyard, patio, porch, terrace 1 6.7%
06 What ignited it

The leading heat sources here

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

#Heat sourceCountShare 
1 Undetermined 6 40.0%
2 Hot ember or ash 2 13.3%
3 Cigarette lighter 2 13.3%
4 Heat from powered equipment, other 1 6.7%
5 Arcing 1 6.7%
6 Hot or smoldering object, other 1 6.7%
7 Flame/torch used for lighting 1 6.7%
8 Flying brand, ember, spark 1 6.7%
07 The biggest fires

4 fires · $726K in losses

Largest single-incident losses in ZIP 53058 across 2021–2025. These 4 fires alone account for 0% of the ZIP's 2025 reported total.

#Property lossTypeYearSeverity
1 $600,000 Building fires 2024 Major
2 $100,000 Building fires 2022 Significant
3 $25,000 Passenger vehicle fire 2022 Significant
4 $500 Passenger vehicle fire 2021 Significant
08 Cities in this ZIP

Most active cities in ZIP 53058

Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 53058.

#City5-yr incidents 
1 Nashotah 43
2 Merton 13
3 Chenequa 12
4 Delafield 9
5 Monroe 1
11 Current conditions

Right now in 53058

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 — 92 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.