The spokeswoman said a crew was working on a ridgeline to keep nearby homes safe.
Three houses nearby were evacuated, more as a precaution as at that stage the flames are not putting the houses in danger.
More firefighters from nearby brigades were on stand by if needed and late yesterday a fire control command centre was on its way from Whangārei to help coordinate the efforts.
Firefighters are about to use heavy machinery to help fight the fire and put in fire breaks.
Police also put a road block at the bottom of Ngakuroa Rd to prevent people from getting to the site to 'help out'.
A spokesman at the scene said people coming to help out could be more of a hinderance, and a potential danger, than a help.
The cause of the fire was still being investigated, the spokeswoman said.