(Portland, OR)  --  Wildfires in Clackamas County are threatening hundreds of homes and other structures.  The Oregonian reports 22 houses and other structures have been destroyed since Sunday night, and another 600 are currently threatened.  The sheriff's office issued new Level 3 evacuations late last night for residents in the area west of Beavercreek Road.  The entire county is currently under some level of evacuation orders.