Mosquito Fire at 76,788 acres and is now 90% contained

PLACER COUNTY — There has been little to no growth in the Mosquito Fire’s size for days. It has burned 76,788 acres with 90% containment as of Sunday morning.

Last weekend, warmer, drier temperatures caused areas of unburned fuel within the fire perimeter to become more active, and aircraft were briefly brought in to suppress those areas, the US Forest Service said.

Firefighters were working Saturday to extinguish areas of smoke visible in the north and northwest area of ​​the fire, where resources were still actively engaged in strengthening containment around a 300-acre area of ​​unburned fuel to the north. Crews continue to search for and extinguish hot spots around that island, according to an update posted Sunday.

Aircraft used infrared technology to locate areas of residual heat near the North Fork of the Middle Fork of the American River and the Rubicon River, and firefighters are extinguishing those areas as safety allows.

In addition, more crews and specialized equipment arrive daily as staff time-out and are released to their home units or to support other incidents.

Also on Sunday, the Burned Area Emergency Response team released the Mosquito Post-Fire Soil Burn Severity Map created from satellite imagery and then field-validated over several days. Along with the burn rate, the map shows land ownership and area. Visit to view the map and follow the BAER team’s ongoing efforts and recommendations.

The fire began on September 6 next to Oxbow Reservoir in Placer County and quickly spread through dense brush and steep terrain.

Fire officials say 78 structures were destroyed and 13 structures damaged.

The cause of the fire is under investigation; However, PG&E says an electrical fault was detected near where the fire started around the same time it started. The company also noted that they had not seen any damage or abnormal conditions at the pole. There was no vegetation or tree found on the line.

See road closures near the Mosquito fire on the interactive map from Caltrans:

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