A woman is fighting for her life in hospital after collapsing from severe heat stress at a Gold Coast market.
Paramedics were called to a night market in Helensvale on Saturday to a woman, 45, who was found to be in cardiac arrest.
She was taken to Gold Coast University Hospital in a critical condition.
Temperatures in the south-east reached the high-30s on Sunday, with Brisbane Airport recording 38.1 degrees Celsius.
Nambour on the Sunshine Coast reached 37.8C, while the Gold Coast seaway peaked at 34.4C.
It followed a stinker of a night, with temperatures in the south-east staying in the mid-20s.
Bureau of Meteorology forecaster Jonty Hall said by 8:30am it was already 33 degrees in Brisbane.
"A lot of temperatures are between eight and ten above average for morning temperatures, and that's going to lead into a very hot day across the bulk of the state as well," Mr Hall said.
But he said cooler times were ahead.
"There is a little bit of relief coming with a southerly change that has reached the south-west of Queensland today that will spread to the remainder of southern Queensland in the next couple of days and provide some relief from the hot temperatures for a few days at least," he said.
The western Queensland towns of Winton and Cloncurry sweltered through their hottest January night on record.
Winton dropped down to 33.1 and Cloncurry 32.7 — both record breaking temperatures.
Longreach only got down to a minimum of 31.8, which is the warmest January night since January 5, 1902.