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Mosquito Fire is the largest in California this year


More than 76,000 acres were scorched, and dozens of buildings were destroyed by flames as firefighters continued to battle the wildfire.

Key Highlights

Mosquito Fire first broke out on Sept. 6. As of Sept. 20, the fire was 39% contained.

Over 3,500 active firefighting personnel were working to put out the flames.

The intense wildfire has destroyed more than 70 buildings.

Mosquito Fire’s Fierce Flames

Firefighters continue to battle flames from the Mosquito Fire that has become California’s largest wildfire of the year. So far, the wildfire has grown to more than 76,000 acres and destroyed at least 70 buildings. No one has died. 

Flames broke out earlier this month at Mosquito Road and Oxbow Reservoir, east of Foresthill in Placer County. An intense heatwave hampered firefighting efforts as temperatures reached nearly 110 degrees and didn’t dip below 100 for days. Weekend rain helped firefighters' efforts.

California has seen more than 6,300 fires this year, slightly above the year-to-date average of about 6,200. Nationally, the U.S. has seen 91 significant fire incidents and 50,000 wildfire incidents that have burned more than 6,700,000 acres, according to the National Interagency Fire Center. 


Wildfires are unplanned, can start instantly, grow quickly, cause business disruptions, destroy property, and threaten lives. Although the cause of the Mosquito Fire is under investigation, extreme temperatures, drought conditions, and lightning strikes can all contribute to the threat of wildfires. AccuWeather’s unique tools like Wildfire Proximity Alerts and air pollution forecast powered by Plume Labs ensure you get the vital information you need to avoid dangerous conditions.

Be prepared—partner with our experts.

Protect your business from the dangers of wildfire season. Stay alert and be prepared with AccuWeather. Register now for our 9/21 wildfire season update webinar. Join our On-Air Meteorologist, Geoff Cornish, for a look at the 2022 wildfire season forecast. Plus, is your business ready to face a wildfire? We will preview the new tools AccuWeather For Business has developed to ensure you have the latest warnings at your fingertips, helping your organization plan for and stay ahead of dangerous conditions. 


Join AccuWeather's experts for an update on this year's wildfire season. 

Register now for our webinar on 9/21.