By Thursday afternoon, authorities said crews had completely stopped any spread to Shady Hills and Avon Ridge, two of the areas that were of most concern.
The Department of Fire and Emergency Services (DFES) deputy commissioner, Craig Waters, said although 90% of the fire had been mapped that did not mean they had brought it under control.
“Crews worked extremely hard, in trying conditions, and managed to stop any spread to Shady Hills and Avon ridge,” Waters said.
“The strong winds will pose some troubles and issues overnight [into Friday], however, the consistent wind direction will hopefully enable us to avoid having to deal with outbreaks in unexpected areas.”
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The number of homes destroyed by an out-of-control bushfire in Perth s northeast has been revised up to more than 80 as firefighters battle flames fanned by strong winds for the fourth day.
The massive blaze with a 126-kilometre perimeter has raced northwest across the city s coastal plain after destroying dozens of homes near the hills town of Wooroloo on Monday night.
Estimates of properties lost started at 56 on Tuesday morning, but by Wednesday that number had grown to 71, with concerns more had been destroyed.
Premier Mark McGowan confirmed those fears on Thursday, saying assessment teams had now identified 81 homes lost to the fire.