ZIP 37920 recorded 207 fire and hazmat incidents in 2025, 1,175 across 2021–2025. Primary county: Knox County, TN. FEMA NRI rates wildfire risk here as High.
1,175 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 205 | |
| 2022 | 228 | |
| 2023 | 287 | |
| 2024 | 248 | |
| 2025 | 207 |
Mar peaks. Jun dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 37920 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Power line down | 122 | 10.4% | |
| 2 | Brush, or brush and grass mixture fire | 117 | 10.0% | |
| 3 | Building fires | 109 | 9.3% | |
| 4 | Passenger vehicle fire | 73 | 6.2% | |
| 5 | Outside rubbish, trash or waste fire | 64 | 5.4% |
For the 17 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 37920 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Outside area, other | 76 | 17.0% | |
| 2 | Engine area, running gear, wheel area | 58 | 13.0% | |
| 3 | Open area - outside; included are farmland, field | 51 | 11.4% | |
| 4 | Undetermined | 50 | 11.2% | |
| 5 | Wildland, woods | 33 | 7.4% | |
| 6 | Cooking area, kitchen | 19 | 4.3% | |
| 7 | Other | 18 | 4.0% | |
| 8 | Highway, parking lot, street: on or near | 18 | 4.0% | |
| 9 | All other areas | 123 | 27.6% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 227 | 50.9% | |
| 2 | Heat source: other | 29 | 6.5% | |
| 3 | Radiated, conducted heat from operating equipment | 24 | 5.4% | |
| 4 | Hot or smoldering object, other | 22 | 4.9% | |
| 5 | Hot ember or ash | 18 | 4.0% | |
| 6 | Arcing | 17 | 3.8% | |
| 7 | Heat from powered equipment, other | 15 | 3.4% | |
| 8 | Spark, ember or flame from operating equipment | 12 | 2.7% | |
| 9 | All other sources | 82 | 18.4% |
Largest single-incident losses in ZIP 37920 across 2021–2025. These 8 fires alone account for 521% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $1,500,000 | Building fires | 2023 | Major |
| 2 | $600,000 | Building fires | 2021 | Major |
| 3 | $400,000 | Building fires | 2023 | Major |
| 4 | $300,000 | Building fires | 2023 | Major |
| 5 | $250,000 | Building fires | 2022 | Major |
| 6 | $225,000 | Building fires | 2024 | Significant |
| 7 | $200,000 | Building fires | 2021 | Significant |
| 8 | $200,000 | Building fires | 2024 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 37920.
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 — 1,175 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.