Roof blown off building as wild storms sweep across NSW

Major clean-up efforts are under way across New South Wales after wild weather battered the state yesterday and overnight, following Sydney's hottest day in four years.

Emergency crews responded to more than 370 calls for help overnight as damaging winds swept through, bringing down trees and powerlines in the late afternoon.

The wild weather came after Sydney residents sweltered through the city's hottest day since 2019, reaching 43 degrees by midday.

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Roofs were blown from buildings and trees were uprooted across the Central Coast as storms generated severe winds across the state from late afternoon yesterday.

The SES confirmed at least nine properties were damaged across the state.

The most severe damage occurred around the Long Jetty area on the Central Coast, where a roof was completely blown off a building and flew onto a neighbouring home.

More than 3000 properties have been without power in the area, according to Ausgrid.

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A Mudgee man had a very near brush with disaster after a lightning strike caused a tree to crush his car, moments after he walked away from it.

Earlier, the Bureau of Meteorology issued a severe weather warning for damaging winds in metropolitan Sydney and the Illawarra, as well as the Mid North Coast, South Coast and Snowy Mountains.

"Severe thunderstorms are likely to produce damaging wind gusts, with large hailstones and heavy rainfall that may lead to flash flooding also possible in the warning area over the next several hours," the Bureau warned.

Heavy machinery was brought into a Sydney suburban street to clear up gum trees that had fallen across the road.

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In Adelaide, major events have been called off due to wild and wet weather.

The city yesterday saw a sudden summer soaking and strong winds tore trees down across the state.

More rain is forecast for the city today, with another 20mm expected to fall alongside cold and windy conditions.

Meanwhile, Cyclone Jasper is forecast to bring constructive winds, flooding and rough seas when it sweeps across Queensland in the coming days.

Despite experts warning residents not to panic, supermarkets in the state's north have been stripped bare by residents stocking up on supplies.