Northern Territory Police say two fires burning near Uluru Kata Tjuta National Park have already caused an estimated $4 million in damage.

The fires have destroyed several buildings and cars within the Ayers Rock Resort.

A helicopter is on standby at the resort in case of evacuation.

Police say one fire is still burning out of control near Uluru.

It has destroyed at least six of the resort's luxury units known as Longtitude 131, located near the monolith.

It is not known if anyone was staying in the units at the time.

The blaze has also damaged a fire vehicle.

The second fire is under control but has destroyed several cars and forced the part evacuation of the Desert Oak residence, which houses staff.

A spokesman for the resort has refused to comment but says a disaster response plan is in place.

A police plane from Alice Springs is on its way. No injuries have been reported.

Police say it is not yet known how the fires began.