The fire located about 30 km south west of Vanderhoof was very active over night, according to the BC Wildfires website.
The size of the fire has increased to 5,200 hectares due to wind and continued dry conditions.
Heavy equipment has worked throughout the night to build a one km fuel-free fire guard.
The evacuation alert has been expanded to include the residents south of Nulki Lake. The alert includes the 18.5 km mark of Kenny Dam Road south to Greer Creek, including Corkscrew Road, Edwards Road, York Drive, Surprise Drive and Szanz Drive, Greer Valley Road, Brophy Road, and the Kluskus Forest Service Road.
Cause of the fire is still under investigation.
There are currently 60 wild fire fighters working to contain the fire. Ground crew are being supported by two groups of air tankers dropping fire retardant. There are also six helicopters working on the fire, along with 54 pieces of heavy equipment.
An incident management team arrived Tuesday to direct fire suppression operations.
Structural protection units are now in the area assessing homes in the evacuation alert area.