Crook County authorities have advised residents of 27 homes to evacuate as a wildfire in the Ochoco Mountains of Central Oregon grows in heavy timber.

Crook County emergency services manager Michael Ryan said most people complied with the evacuation alert issued Thursday morning, but a few former wildland firefighters living in the Marks Creek area stayed behind.

The evacuation area includes the Mount Bachelor Academy, which was shut down by the state in 2009 amid allegations it mistreated troubled teens.

Ryan says the Bailey Butte fire, part of the Waterman Complex west of Mitchell, moved into heavy timber in a wilderness area overnight and built up strength. It is now moving to the southeast, flanking the Marks Creek area.