Parts of Victoria, South Australia and New South Wales are set to swelter through record-breaking temperatures this week, according to the Bureau of Meteorology.
The temperature in Melbourne could hit 34 degrees Celsiuson Thursday 11C over the average November maximum.
Adelaide, meanwhile, is set to reach 36C, which is 12C over the average.
On Friday, Sydneysiders could be facing a 37C day, which is 13C over the average.
Sydney is forecast to experience a low intensity heatwave over the next few days.