Mosquito Fire in Placer County, CA, Doubled in Size Overnight | Blaze Started by PG&E Faulty Power Line The Mosquito Fire burning in Placer County, CA, exploded to 25,108 acres yesterday and crossed into El Dorado County, according to fire authorities.ย It is currently 0% contained. Bloomberg is reporting that the fire was started by a fault in a PG&E Corp. power line in the Sierra Nevada foothills. Related: [VIDEO] Big Bear Ski Area, CA, Employees Fire Up Snowguns […] Fire Firebrains | September 9, 2022 1 Comment