A mammoth effort by Australian firefighters saved homes from an out-of-control bushfire near Perth overnight, authorities said Thursday, but warned strong winds and rough terrain posed an ongoing challenge.

At least 81 homes have been destroyed in the blaze at the Perth Hills, on the eastern fringes of Australia’s fourth-biggest city, with surveys of areas burned earlier this week adding another 10 to the tally.

Seven firefighters have sustained minor injuries but no deaths have been reported in the bushfire, which has scorched 10,000 hectares since it was sparked Monday.

It comes about a year after Australia was hit by unprecedented climate change-fuelled bushfires, devastating whole communities and wiping out billions of animals.

More than 3.5 million hectares were burned across Western Australia during 2019-2020.