Authorities have warned of a severe heatwave in South Australia, with temperatures in some areas nudging 50C today.
Adelaide's CBD climbed to a top of 41.8C today, while Marree Airport in the state's north west reached a staggering 47C just after 4pm.
Tonight the Bureau of Meteorology (BoM) has issued a severe fire danger warning for the Mid North, Mount Lofty Ranges and Lower South East districts.
People in the affected areas have been told to enact their Bushfire Survival plans as a precaution.
The high temperatures are expected to continue until late tomorrow afternoon, when a cool change sweeps the state and drops the mercury back down into the high-20s. Meanwhile, Melbourne continues to sweat it out with the mercury hovering at 36C at 8pm (AEST), The heat has triggered widespread power outages in the city and state, with thousands of homes affected.
Unlike Adelaide, Melbourne won't escape the blistering temperatures for the start of the working week, with 35C forecast.
Further north, Sydney has largely dodged the hot weather today, with some breaks of sunshine and a maximum of 28C.
Tomorrow will be much the same, with a partly cloudy 28C.
In Brisbane, a morning of showers cleared today with, making way for a top of 30C tomorrow. Meanwhile, Perth enjoyed a gorgeous end to the three-day weekend with a high of 29C and light breezes.
The holiday will continue on Monday, with more sunshine and a top of 30C.