SIERRA COUNTY, California – The Bear Fire in the Tahoe National Forest grew to 3,000 acres by Wednesday morning thanks to a mix of warming temperatures, dry fuel conditions and strong winds, officials said. The wildfire was 0% contained, the U.S. Forest Service said in an update Wednesday morning. The jump in fire activity led the Sierra County Sheriff’s Office to expand evacuation warnings according to the USFS. Earlier, an evacuation order was issued for the community of Sierra Brooks… Crews, meanwhile, were working to establish containment lines while aircraft dropped retardant and water on the flames. The Bear Fire was reported around 2 p.m. Monday off Bear Valley Road, south of Sierra Brooks, according to the USFS. The cause of the fire is undetermined and under investigation.