ZIP 53045 recorded 131 fire and hazmat incidents in 2025, 675 across 2021–2025. Primary county: Waukesha County, WI. FEMA NRI rates wildfire risk here as Moderate.
675 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 178 | |
| 2022 | 128 | |
| 2023 | 101 | |
| 2024 | 137 | |
| 2025 | 131 |
Jan peaks. Nov dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 53045 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Building fires | 101 | 15.0% | |
| 2 | Gas leak (natural gas or LPG) | 93 | 13.8% | |
| 3 | Arcing, shorted electrical equipment | 69 | 10.2% | |
| 4 | Power line down | 67 | 9.9% | |
| 5 | Electrical wiring/equipment problem, other | 50 | 7.4% |
For the 22 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 53045 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Outside area, other | 24 | 15.8% | |
| 2 | Cooking area, kitchen | 23 | 15.1% | |
| 3 | Engine area, running gear, wheel area | 22 | 14.5% | |
| 4 | Wildland, woods | 12 | 7.9% | |
| 5 | Open area - outside; included are farmland, field | 10 | 6.6% | |
| 6 | Vehicle storage area; garage, carport | 6 | 3.9% | |
| 7 | Bedroom - < 5 persons; included are jail or prison | 5 | 3.3% | |
| 8 | Highway, parking lot, street: on or near | 5 | 3.3% | |
| 9 | All other areas | 45 | 29.6% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 30 | 19.7% | |
| 2 | Heat from powered equipment, other | 19 | 12.5% | |
| 3 | Heat source: other | 16 | 10.5% | |
| 4 | Radiated, conducted heat from operating equipment | 14 | 9.2% | |
| 5 | Arcing | 12 | 7.9% | |
| 6 | Cigarette | 7 | 4.6% | |
| 7 | Heat, spark from friction | 6 | 3.9% | |
| 8 | Hot ember or ash | 6 | 3.9% | |
| 9 | All other sources | 42 | 27.6% |
Largest single-incident losses in ZIP 53045 across 2021–2025. These 8 fires alone account for 132% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $200,000 | Road freight or transport vehicle fire | 2025 | Significant |
| 2 | $150,000 | Building fires | 2022 | Significant |
| 3 | $125,200 | Building fires | 2022 | Significant |
| 4 | $125,000 | Building fires | 2025 | Significant |
| 5 | $100,000 | Building fires | 2024 | Significant |
| 6 | $100,000 | Forest, woods or wildland fire | 2025 | Significant |
| 7 | $96,200 | Building fires | 2021 | Significant |
| 8 | $85,000 | Road freight or transport vehicle fire | 2022 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 53045.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Brookfield | 667 | |
| 2 | New Berlin | 1 | |
| 3 | Waukesha | 1 |
The figures above are historical. For today's air quality, fire-weather warnings, and active fires, go to the official sources.
NFIRS reports each fire incident with a 5-digit address ZIP. We aggregate those rows directly to produce ZIP-level totals — 675 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.