( CNN ) -- Wildfires raced across Northern California overnight , charring at least 9,000 acres and forcing thousands from their homes , fire officials said . The King Fire is roaring through the El Dorado National Forest , about 60 miles east of Sacramento . Some 8,600 acres have burned and the flames are only 5 % contained , according Cal Fire . Thousands of folks have had to evacuate . `` We still have about 500 homes -- we 're calling them threatened -- and we suggest people to stay out of them for now , '' Lynne Tomalchoff , a Cal Fire spokeswoman , told CNN affiliate KCRA . Mandatory and voluntary evacuations are in place across large swaths of El Dorado County . About 250 miles to the north and near the Oregon border , the Boles Fire is much smaller at 400 acres , but more threatening . Some 1,500 homes are under evacuation orders in Siskiyou County . The evacuations cover the communities of Weed and Carrick . `` We 're encouraging those folks to leave their homes , '' Suzi Brady with Cal Fire told affiliate KDRV . `` This is not the year you want to stay there . The fuel types are extremely dry . '' More than 100 structures have been damaged or destroyed , according to Allison Giannini with the Siskiyou County Sheriff 's Department . Wildfire closes Half Dome at Yosemite . What to know about wildfires .
The El Dorado Fire has charred roughly 8,600 homes in Southern California . Many more are threatened . The Boles Fire near the Oregon is only 100 acres . More than 1,500 homes are under evacuation orders there .