ZIP 48104 recorded 325 fire and hazmat incidents in 2025, 2,064 across 2021–2025. Primary county: Washtenaw County, MI. FEMA NRI rates wildfire risk here as Moderate.
2,064 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 363 | |
| 2022 | 423 | |
| 2023 | 636 | |
| 2024 | 317 | |
| 2025 | 325 |
Mar peaks. Apr dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 48104 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Cooking fire, confined to container | 414 | 20.1% | |
| 2 | Power line down | 410 | 19.9% | |
| 3 | Gas leak (natural gas or LPG) | 285 | 13.8% | |
| 4 | Electrical wiring/equipment problem, other | 182 | 8.8% | |
| 5 | Carbon monoxide incident | 164 | 7.9% |
For the 18 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 48104 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Cooking area, kitchen | 26 | 18.2% | |
| 2 | Undetermined | 23 | 16.1% | |
| 3 | Engine area, running gear, wheel area | 22 | 15.4% | |
| 4 | Vehicle area, other | 5 | 3.5% | |
| 5 | Bedroom - < 5 persons; included are jail or prison | 4 | 2.8% | |
| 6 | Bathroom, checkroom, lavatory, locker room | 4 | 2.8% | |
| 7 | Outside area, other | 4 | 2.8% | |
| 8 | Other | 3 | 2.1% | |
| 9 | All other areas | 52 | 36.4% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 42 | 29.4% | |
| 2 | Heat from powered equipment, other | 18 | 12.6% | |
| 3 | Radiated, conducted heat from operating equipment | 15 | 10.5% | |
| 4 | Arcing | 15 | 10.5% | |
| 5 | Heat source: other | 13 | 9.1% | |
| 6 | Hot ember or ash | 7 | 4.9% | |
| 7 | Hot or smoldering object, other | 6 | 4.2% | |
| 8 | Heat from direct flame, convection currents | 5 | 3.5% | |
| 9 | All other sources | 22 | 15.4% |
Largest single-incident losses in ZIP 48104 across 2021–2025. These 8 fires alone account for 303% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $1,000,000 | Building fires | 2023 | Major |
| 2 | $1,000,000 | Building fires | 2025 | Major |
| 3 | $450,800 | Building fires | 2021 | Major |
| 4 | $400,000 | Building fires | 2021 | Major |
| 5 | $350,000 | Building fires | 2021 | Major |
| 6 | $350,000 | Building fires | 2022 | Major |
| 7 | $200,000 | Building fires | 2021 | Significant |
| 8 | $175,000 | Building fires | 2022 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 48104.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Ann Arbor | 2,064 |
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 — 2,064 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.