"The Floriston fire grew to over 600 acres within a week, requiring thousands of personnel and escalating costs to nearly $16 million, illustrating the rapid escalation potential of wildfires in the region."
The Floriston wildfire, located 10 miles northeast of Truckee in Nevada County, California, was first discovered on September 16, 2026, and remains active. The fire rapidly expanded from 20 acres at discovery to 622 acres by September 23, with containment progressing from 4% on September 17 to 96% on September 23. Personnel peaked at 1,579 on September 18 before declining to 569 by the latest update. Estimated costs have risen from $330,000 on September 17 to $15,761,915 by September 23. The cause remains undetermined and jurisdictional agency information is not provided. Current fire behavior is minimal, creeping, and isolated torching.
Official source description: 10 Miles NE from Truckee, CA
Minimal; Creeping; Isolated Torching
Good air quality. Outdoor activity is generally safe near this incident.
Nearest reporting station: Truckee. Source: AirNow.gov (EPA).
With the fire now minimal and 96% contained, general wildfire safety guidance applies: stay informed, avoid the fire perimeter, and follow any local evacuation orders if issued.
IRWIN ID: {80DC9935-6CE8-4B42-B4EC-2BA47CE13AA5}
Discovered: Sep 16, 2026
Cause: Undetermined
Est. Cost to Date: $15,761,915
Coordinates: 39.3944, -120.0252
Other wildfires that have recently been contained or dropped from official tracking in CA.
The FLORISTON Fire has burned 622 acres as of September 23, 2026.
As of the latest update, the FLORISTON Fire is 96% contained.
The official cause has been listed as: Undetermined.
The FLORISTON Fire is burning in Nevada, CA.
Yes, as of the latest official update, the FLORISTON Fire remains active.
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