A bushfire has destroyed at least 10 homes north of Perth and emergency warnings remain in place as temperatures are forecast to reach nearly 40 degrees over the weekend.

IAG says it has so far received 13 claims due to the bushfire, mostly for damage to properties, as well as outdoor furnishings, sheds and gazebos.

An estimated 2000 hectares has burnt after a forest blaze on Wednesday was spread by winds to nearby suburbs. 

There were around 20 active warnings on the Emergency WA website on Friday afternoon, including Bushfire Emergency alerts for parts of Jandabup, Melaleuca, Wanneroo and Mariginiup. The primary and secondary schools in Wanneroo were closed on Friday.

An evacuation centre has been established in the Gumblossom Community Centre at Quinns Rocks, with additional temporary accommodation at the Bullsbrook Quarantine Facility. More than 500 people are without electricity and up to 100 transmission lines have been impacted due to the fires across the City of Wanneroo and Swan.

Authorities said favourable conditions overnight allowed some warnings to be downgraded but there is still a threat to lives and homes.

Around 500 Department of Fire and Emergency Services staff and volunteers from multiple agencies are responding to the bushfire, including aerial firefighting support.

“These fires remain a potential threat to lives and homes,” Prime Minister Anthony Albanese said today. “A huge thanks to the firefighters who have been working tirelessly over the past few days and nights to battle fires in Perth’s northern suburbs.”

WA Department of Fire and Emergency Services Assistant Commissioner Rick Curtis says a trough is creating the severe heatwave, which is affecting the state's central west, lower west and south-west areas, including the Perth metropolitan area.

"We began preparing for this weather event last week, so we've got a large range of people and infrastructure capability across the state ready to respond. And as that risk shifts across the state, we will also move our resources accordingly,” he said. 

IAG says customers whose properties have been damaged should contact their insurer to receive immediate support, including temporary accommodation and financial assistance. 

NRMA Insurance EGM Direct Claims Luke Gallagher says IAG has local assessors and builders ready to assess the damage to homes and property once the bushfire is under control and it is safe to enter the impacted areas.

“We’ll continue to remain on standby to support our customers and the community throughout this bushfire emergency,” he said.

The fires come after about 60 homes were destroyed by fire in Queensland in October, and Tasmanian properties were lost in fires at Dolphin Sands, around 140km north of Hobart.