REDDING -- A Shasta County wildfire that shut down an enormous stretch of a major highway continues to surge into wilderness areas.
The Delta Fire that erupted Wednesday has now burned more than 34 square miles of timber and brush and prompted evacuation orders for rural homes in and around Shasta-Trinity National Forest below the Oregon state line.
The blaze had tripled in size overnight.
The fire shut down 45 miles of Interstate 5 and several trucks abandoned on the road burned. Authorities say the road will be closed until at least Friday morning. An alternative route is said to be jammed.
The fire was human-caused but authorities haven't said whether it was an accident or arson.