Sydney, Australia ? Walls of flames 100 feet high swept through parched eucalyptus forests Sunday as several fires raged out of control in southeastern Australia, injuring one man and destroying several homes and seven fire vehicles.

Dozens of people fled their homes north of Sydney as hundreds of firefighters battled flames lapping the edges of the city.

One ambulance volunteer died of a heart attack Sunday night while helping evacuees in the town of Woy Woy, about 40 miles north of Sydney. Near Woy Woy, three houses were destroyed, the New South Wales state Rural Fire Service said.

Elsewhere, a wildfire destroyed five houses and blackened nearly 60,000 acres in Junee, 180 miles southwest of Sydney. A man was hospitalized with burns to 60 percent of his body.

Dozens of fires burned across New South Wales state, fanned by hot dry winds from the Australian Outback as temperatures reached 111 degrees in Sydney.