A 220-acre wildfire burning in Kern County near Lebec has prompted evacuation warnings on Thursday morning.

The fire was first reported shortly before midnight near Lebec along the southbound 5 Freeway near the Fort Tejon ramp, according to the Kern County Fire Department.

As of , the fire is 5% contained with crews actively working to limit it from spreading, the KCFD said.

Fire officials for several areas along the Golden State Freeway. Residents are being told to be prepared to leave their homes if there is a wildfire threat in their area.

Areas under evacuation warning:

• North of: Temescal Drive, Digier Road
• South of: Golden State Freeway
• East of: Grapevine Road
• West of: Golden State Freeway

All four KCFD hand crews were called to battle the scene, as well as air support from retardant-dropping tankers, the KCFD said. 

The has closed the #4 lane from south of Grapevine Road to the Upper Water Hole. Drivers should expect delays and use alternate routes while traveling.

The cause of the fire is unknown. It is unclear if any injuries have been reported.