Almost all of Victoria is under an extreme weather warning as wild conditions continue to sweep across the country.
Parts of New South Wales are today facing two weather extremes, with fire and flood warnings both in place.
Meanwhile Victoria and South Australia are bracing for a day of damaging winds, showers and thunderstorms.
A severe weather warning issued by the Bureau of Meteorology (BoM) sees Victoria covered by a yellow swathe.
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https://twitter.com/BOM_Vic/status/1594119193468747776
"Westerly winds averaging 40-60km/h with gusts to 100km/h are possible over western districts of Victoria, extending eastwards during the day," it wrote.
"The risk is highest near the coast and over elevated terrain. Squally showers and thunderstorms are also possible with locally damaging gusts."
It comes after festival-goers in Melbourne were left covered in mud after storms and heavy rain.
A Day on the Green was held at Mt Duneed Estate on Saturday despite heavy rain, leaving hundreds of cars bogged.
Some revellers had to sleep in their cars.
Fire and floods: A day of two extremes in NSW
Meanwhile, parts of Sydney will climb to 29C today with gusts of hot westerlies up to 50km/h due to sweep through.
That's prompted the Rural Fire Service (RFS) to implement a high fire danger warning, stretching from the Blue Mountains, to the Northern Beaches.
A severe weather warning for damaging winds is also in place for the north and south coast.
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It comes as parts of the state are inundated by floodwater, with Forbes and Eugowra grappling with flooding.
NSW SES has more than 100 flood warnings in place across the state.
Overnight, storms and flash flooding inundated and damaged homes in Wentworth, with the NSW State Emergency Service (SES) receiving 255 requests for assistance.
The SES said two houses had their roofs blown off in the storm.
Another cold front and associated westerly airstream is expected to cross southern and eastern parts of South Australia today, with falls of 15mm expected.
Overnight storms knocked out power for thousands of residents in the state.