9:00PM UPDATE: The Floriston Fire is now 613 acres and 5% contained. Mandatory evacuation orders are back up due to an earlier error, with evacuation warnings in some areas.
Winds in the fire area have decreased from the peak gusts experienced earlier this afternoon. Night-flying helicopters are assigned to the incident and are actively supporting firefighting operations.
Firefighters will continue working through the night to strengthen containment lines and limit the fire’s spread.
3:30PM UPDATE: The Floriston Fire in Nevada County is now five percent contained and has burned 300 acres. There are no mandatory evacuations at this time, but warnings remain. There may be single-lane westbound road closures on I80 as the day goes on. If traveling on I80, check Quickmaps before traveling.
TRUCKEE, Calif. – The Floriston Fire is a fast-moving wildfire burning near Interstate 80 and Floriston, nine miles northeast of Truckee. The fire has led authorities to close westbound lanes of the highway at the Nevada state line.
The wildfire broke out around 10 a.m. on Wednesday, September 16, 2026, in the Truckee River Canyon. Wind gusts of up to 20 mph have fueled the fire. Calfire says the fire quickly grew from 20 mph to 297 acres, and is showing a dangerous rate of speed and spotting. This information is current as of 1 p.m.
There are several aircraft in the area fighting the fire, and several agencies have responded.
Evacuation orders and warnings are in place for some areas of Nevada County.
More information on the fire can be found HERE.
The cause of the fire is under investigation.
