South Australians are being warned of dangerous bushfire conditions as the state prepares for a day of record-breaking heat.
Adelaide is forecast to hit 45C on Thursday, but the Bureau of Meteorology says the city's 80-year-old record high of 46.1C is within reach.
"You wouldn't rule it out," forecaster Jonathan Fischer said.
The heat will intensify in the state's regional centres, with a high of 49C expected at Port Augusta, and 47C at Port Pirie and Roxby Downs.
"Nowhere is going to escape," Mr Fischer said.
"We will see records broken tomorrow, with many locations forecast to be near their maximum all-time record."
But CFS state duty commander Yvette Dowling warned the soaring temperatures will lead to unmanageable bushfire conditions.
"If a fire does start with these forecast weather conditions, we're not going to be able to control that fire," she said.
She urged the public to avoid risky behaviour in order to minimise the bushfire threat.
"The communities are at risk, our firefighters are at risk, all emergency services are at risk tomorrow."