The mercury has reached 36 degrees in Brisbane as it continues to soar towards its predicted top of 38C.
The Bureau of Meteorology recorded the sweltering temperature at Kangaroo Point in the city just before midday on Sunday.
Forecaster Lauren Murphy said it would continue to climb over the coming hours before a southeasterly change brought cooler temperatures in the late afternoon.
"There is some relief in sight," she told AAP on Sunday.
Ms Murphy said the predicted top of 38C was eight degrees above average for Brisbane in January.
"It's unusual but it's certainly not unprecedented," she said, referring to the city's record temperature of 43.2C.
But some records were broken in other parts of the state overnight.
Residents living in the outback town of Winton endured their hottest overnight temperature on record on Saturday night, with the mercury dipping to just 33.1C.
Cloncurry also equalled its all-time warmest night with a low of 32.7C, while Longreach had its hottest night on record since 1902 with a minimum of 31.8C.
The hottest place in Queensland on Sunday is expected to be Julia Creek, with a top of 43C.