AGNESS, OR -- The Flat Fire, in Southern Oregon, is now estimated at 12,756 acres, as of Wednesday morning. It's burning in scars from the Biscuit and Klondike fires.  It’s considered zero-percent contained and the cause is under investigation. 

Crews continue to strengthen firelines and more resources are responding to the area. There are now 516 personnel with 10 engines, four bulldozers, two water tenders, six masticators and seven helicopters. 

Some trails and roads are closed in the Rogue River Siskiyou National Forest, along with a portion of the Illinois River.