Northland firefighters in Canada are working up to 16-hour days helping to contain a fire about half the size of Kaipara.
Just 30 per cent of a large fire covering about 168,000 hectares burning in Elephant Hill in British Columbia has so far been contained. Sixty New Zealand firefighters are among more than 600 ground crew attending to it.
As a comparison, Kaipara District covers 311,700 hectares and Whangarei District 285,000 hectares.
Seven employees of Whangarei-based Forest Protection and Fire Emergency New Zealand's Wipari Henwood, from Kerikeri, left early this month after a request for help from Canadian fire authorities.
Brothers Nathan and Kieran Sullivan initially worked on the Elephant Hill fire but have since moved to Sioux Lookout, a town in Ontario, where about 70 small fires mostly caused by lightning strikes are burning.