Developing analysis · Record 007
Gustin Fire,
Perris.
A compact incident record tracking a vehicle-fire ignition, fast initial growth, sensor-aircraft mapping and rapid containment.
Editorial review: 21 September 2026 · Version 1
Snapshot
A small fire with a clear first-night record.
CAL FIRE’s dedicated incident page reports the Gustin Fire at 30 acres and 90% containment, east of Gustin Lane and south of Cajalco Road in Perris.
The first CAL FIRE update described a vehicle on fire with extension into surrounding vegetation.
One patient was evaluated at the scene and transported with minor injuries in the initial update.
Evolution of knowledge
From ignition to patrol.
CAL FIRE later reported 30 acres and said the incident would remain under patrol for several days. What does “forward progress stopped” mean? →
Evidence reading
Why 30 acres became 28—and then 30.
The first-night record demonstrates how early wildfire acreage can be revised when better mapping arrives. CAL FIRE specifically attributed the 28-acre value to sensor-aircraft data.
Evidence discipline
What remains unknown.
- A final technical cause determination.
- The detailed ignition mechanism linking the vehicle fire to surrounding vegetation.
- A final mapped perimeter and close-out acreage.
- The final incident disposition after patrol operations conclude.
Provenance
Sources and release.
- CAL FIRE — Gustin Fire incident page ↗Primary source for location, 30-acre / 90% snapshot, origin description, injury and patrol status.
- CAL FIRE — 18 September, 10:34 PM update ↗Source for 28 acres, 10% containment and sensor-aircraft mapping.
Version 1 · 21 September 2026: initial compact record.