Australian authorities warned on Friday of severe fire danger in densely populated areas this weekend, declaring a state of emergency in the capital, Canberra, as soaring temperatures and strong whipped up huge, unpredictable blazes.

With temperatures above 40 Celsius (104 Fahrenheit), emergency officials urged people to prepare for fires in parts of the southeast including hundreds of miles of coast south of Sydney that has already been badly hit in months of blazes.

“Tomorrow will be the peak of the heatwave in NSW with some areas expected to reach extreme heatwave conditions,” the New South Wales (NSW) state Rural Fire Service said in a Facebook post late on Friday.

Australia’s bushfires that have killed 33 people and an estimated 1 billion native animals since September. About 2,500 homes have been destroyed as more than 11.7 million hectares (117,000 sq km) have been razed.

Andrew Barr, chief minister of the Australian Capital Territory (ACT), said the area's first state of emergency since fatal wildfires in 2003 indicated the danger this weekend. Four people were killed and almost 500 homes destroyed in 2003.

Officials said an out-of-control fire in the ACT's south, on the doorstep of Canberra, had grown to 185 sq km, almost 8 per cent of the territory’s land mass. “This fire may become very unpredictable. It may become uncontrollable,” Barr said in a televised briefing. Reuters