Fire crews battling the Penley Fire west of Sedalia made significant progress overnight, holding the wildfire at about 3 acres and reaching 50% containment, according to Douglas County officials.

The fire, which sparked Sunday west of Sedalia, prompted evacuation orders for residents in the surrounding area as more than 125 firefighters from 10 agencies worked to contain the blaze and protect nearby structures.

Despite the progress, officials said firefighting efforts remain challenging because crews are working in steep, rugged terrain with limited ground access.

The Douglas County Helitack Team was scheduled to resume aerial operations Monday to support firefighters on the ground.

Emergency responders first mobilized Sunday afternoon after reports of a wildfire in the area. At about 5 p.m., the Douglas County Sheriff’s Office issued evacuation orders for residents within a 2-mile radius of West Douglas Fire Station 132.

Officials said evacuation zones remain unchanged from Sunday night. Authorities urged residents near the area to remain alert and continue monitoring official updates as conditions can change quickly.

Anyone needing assistance evacuating was instructed to call 911.

The cause of the fire remains under investigation. Officials said additional information will be released as it becomes available.