Australia bushfire crisis may worsen in hot winds

South Australia's Country Fire Service is warning people in extreme and catastrophic fire danger areas to enact their bushfire survival plans.

A total fire ban is in place across South Australia, with many locations set to reach temperatures above 4degC. Meanwhile residents in Sydney's northwest bushland suburbs are on alert as the Gosper Fire has more than doubled in size since last week.

Alex Perrottet reports.

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