Bushfires raging across Australia’s east coast destroyed two buildings on a rural property owned by Russell Crowe, the Oscar-winning actor said on Twitter on Wednesday.

The 55-year-old posted a video and pictures on his Twitter feed of a helicopter water-bombing smoke-filled trees near a fence and driveway, commenting: "Top shot son!"

Crowe had earlier confirmed that he was not in Australia and that his family was safe with friends.

Bushfires are a common and deadly threat in Australia’s hot summers, but the blazes have arrived earlier this year, spurred by dry conditions after three years of drought, and have already claimed three lives.

In a post showing burned ground and charred objects at his property in northeast New South Wales state, Crowe said: "lost a couple of buildings, but overall very lucky so far. Chapel roof scorched."

He thanked those on the ground and said no livestock or horses had died.

"Let the chickens out and they are back, warm worms for breakfast!", the actor tweeted.

It came as Australian officials ordered people in several communities to evacuate immediately on Wednesday as firefighters struggled to contain more than 150 bushfires. 

Australian police suspect that 12 fires were started by arsonists after examining unexplained ignition points. 

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“It’s awful, it angers every firefighter and angers everybody in the community,” Shane Fitzsimmons, commissioner of the New South Wales rural fire service, said. 

While cooler weather overnight brought some relief for firefighters in New South Wales state, attention shifted to its northern neighbour, Queensland, where hot, dry and windy conditions brought severe fire danger.

Authorities issued a "leave immediately" warning, the highest level, for several areas including Noosa, a beachside holiday destination 150 km (93 miles) north of Brisbane, the state capital of Queensland.

New South Wales fire danger ratings

"Conditions are now very dangerous and firefighters may soon be unable to prevent the fire advancing," Queensland Fire and Emergency Services said. 

"The fire may pose a threat to all lives directly in its path." Tony Wellington, the mayor of Noosa, told Reuters many of the residents in the affected north, accessible only by ferry or via the beach, had got out this week.

Across the country, in Western Australia, officials were responding to two emergency bushfires that had destroyed two homes and damaged another.

The fires have sparked increasingly acrimonious debate over climate and fire-prevention policies, with the ruling conservative Liberal Party and the minor opposition Australian Greens exchanging barbs.

Former deputy prime minister Barnaby Joyce was among those who have suggested that climate activists were at least partly responsible for the fires by lobbying to reduce so-called back burns, fires deliberately lit to clear dry undergrowth.

Independent lawmaker Zali Steggall said it was very "unbecoming of our parliament" for Mr Joyce to make such remarks.