More than 60 wildfires were burning in New South Wales on Sunday, a day after they destroyed at least 12 homes in the state's central coast region, with a population of more than 350,000 people, about 45 kilometers north of the state capital Sydney, Australia's largest city.

Authorities have warned of a high-risk bush fire season this Australian summer with increased risk of extreme heat forecast for large swaths of the country, after several quiet seasons.

Prime Minister Anthony Albanese said fortunately there had been no loss of life so far in the fires.

"This summer, of course, like all summers it would appear in recent times, is going to be a difficult one," Albanese said in remarks on Australian Broadcasting Corp television on Sunday.

Federal and New South Wales Labor governments said in a statement that disaster assistance was activated for six state regions hit by fires, which sparked in extreme heat on Saturday.

"Initial assessments indicate a number of homes have been destroyed with extensive damage to more private property, critical infrastructure, fencing, agricultural assets and National Parks," the statement said, adding that the extent of damage would become clearer as impact assessments were done.

The aid included "immediate financial help as well as clean-up, rebuilding and recovery assistance," according to the statement.

Two fires in New South Wales continued to burn out of control on Sunday at the second-highest danger rating, according to the state's Rural Fire Service.

New South Wales is one of the most wildfire-prone regions in Australia, with the risk increasing due to climate change. Australia's "Black Summer" fires of 2019-2020 destroyed an area the size of Turkey and killed 33 people.

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