ZIP 78666 recorded 635 fire and hazmat incidents in 2025, 2,830 across 2021–2025. Primary county: Hays County, TX. FEMA NRI rates wildfire risk here as Very High.
2,830 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 499 | |
| 2022 | 607 | |
| 2023 | 621 | |
| 2024 | 468 | |
| 2025 | 635 |
Mar peaks. Apr dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 78666 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Gas leak (natural gas or LPG) | 399 | 14.1% | |
| 2 | Building fires | 221 | 7.8% | |
| 3 | Passenger vehicle fire | 180 | 6.4% | |
| 4 | Grass fire | 173 | 6.1% | |
| 5 | Outside rubbish, trash or waste fire | 160 | 5.7% |
For the 57 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 78666 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 124 | 22.5% | |
| 2 | Engine area, running gear, wheel area | 105 | 19.0% | |
| 3 | Outside area, other | 84 | 15.2% | |
| 4 | Cooking area, kitchen | 25 | 4.5% | |
| 5 | Other | 18 | 3.3% | |
| 6 | Bedroom - < 5 persons; included are jail or prison | 16 | 2.9% | |
| 7 | Open area - outside; included are farmland, field | 15 | 2.7% | |
| 8 | Operator/passenger area of transportation equip. | 13 | 2.4% | |
| 9 | All other areas | 152 | 27.5% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 368 | 66.7% | |
| 2 | Heat from powered equipment, other | 28 | 5.1% | |
| 3 | Heat source: other | 18 | 3.3% | |
| 4 | Arcing | 17 | 3.1% | |
| 5 | Hot or smoldering object, other | 16 | 2.9% | |
| 6 | Radiated, conducted heat from operating equipment | 15 | 2.7% | |
| 7 | Hot ember or ash | 11 | 2.0% | |
| 8 | Spark, ember or flame from operating equipment | 10 | 1.8% | |
| 9 | All other sources | 69 | 12.5% |
Largest single-incident losses in ZIP 78666 across 2021–2025. These 8 fires alone account for 137% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $2,000,000 | Building fires | 2025 | Major |
| 2 | $800,000 | Building fires | 2023 | Major |
| 3 | $275,000 | Building fires | 2025 | Major |
| 4 | $175,000 | Building fires | 2023 | Significant |
| 5 | $150,000 | Road freight or transport vehicle fire | 2021 | Significant |
| 6 | $150,000 | Building fires | 2022 | Significant |
| 7 | $150,000 | Building fires | 2025 | Significant |
| 8 | $145,000 | Building fires | 2022 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 78666.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | San Marcos | 2,794 | |
| 2 | Redwood | 17 | |
| 3 | New Braunfels | 1 | |
| 4 | Seguin | 1 |
Some ZIPs span multiple counties. The primary above is the largest by population weight; secondary counties are below.
| County | State | Weight | |
|---|---|---|---|
| Caldwell County | TX | 0.50 | FIPS 48055 |
| Guadalupe County | TX | 0.50 | FIPS 48187 |
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 — 2,830 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.