Thousands of homes left without power after a freak storm battered South Australia

More than 8,000 properties across South Australian remain without power after storms lashed the state, with a heatwave now expected across the country.

SA Power Networks said its crews were continuing to return services to customers across the Adelaide Hills and the mid-north, on Kangaroo Island and in the southeast after the wild weather on Tuesday night.

At one stage more than 32,000 of its customers lost electricity with the storms also sparking a spate of scrub fires caused by 300,000 lightning strikes.

More than 8,000 properties across SA remain without power after storms lashed the state, with 300,000 lightning strikes reported (pictured, the storms on Tuesday over Adelaide)

The Bureau of Meteorology said thunderstorms are expected in the NSW on Wednesday, with above average temperatures expected throughout the state

The Bureau of Meteorology said thunderstorms are expected in the NSW on Wednesday, with above average temperatures expected throughout the state

At one stage more than 32,000 of its customers lost electricity. SES workers are seen removing a fallen tree from a SA home on Tuesday night (pictured)

At one stage more than 32,000 of its customers lost electricity. SES workers are seen removing a fallen tree from

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