Wind is forecast to gust up to 90km/h in exposed places today.
Earlier this morning, the police launch took one crew from Auckland City to the island with portable fire-fighting equipment - and more crews were sent on a ferry.
Fire-fighters were maintaining a perimeter around "several homes that are in danger", fire officer Paul Radden said.
One house was evacuated with around 30 people assembling on a nearby beach to be taken off the island by the police launch.
The cause of the fire is yet to be determined.
There have also been three house fires in Auckland overnight - and at least four scrub fires in Northland, in Mangonui, Horeke, Omapere and Ruakaka areas, all fanned by strong winds.