Fire and Emergency crews are responding to a vegetation fire in the Tahorakuri Forest 20 kilometres north of Taupō.
Emergency services were called to the fire on Te Toke Road in the Tahorakuri Forest area shortly before 1pm on Wednesday.
Fire and Emergency said the fire was not contained or controlled and was approximately four hectares in size.
Twelve trucks, tankers and support vehicles are at the scene along with two helicopter working to contain the fire from the air.
Fire and Emergency said a third helicopter was heading to the fire to assist.
Earlier, the police said they had been helping firefighters set up cordons.
A spokesperson said it did not appear any evacuations were required at this time.