Southeast Queensland residents recovering from Sunday's storms while they sweat in sauna-like conditions have been warned to prepare for more destructive weather.
The electrical storm damaged hundreds of power lines and left thousands without power.
Two days on, just under 1000 Energex customers are still waiting for their electricity to be restored on Tuesday.
Much of the state is currently in the midst of a heatwave, with Brisbane expected to hit 34 degrees on Tuesday after residents woke to humidity above 80 per cent.
Bureau of Meteorology forecaster Annabelle Sord told AAP the "unstable" system could lead to storm activity on Tuesday afternoon, similar to Sunday night's weather event.
The bureau issued a severe thunderstorm warning for parts of the Darling Downs region, including damaging wind gusts.
Any storm activity may offer some respite to residents who sweltered through another hot night, with Brisbane's minimum temperature hovering around 26C, which is about five degrees above average.
Elsewhere, the outback town Winton broke its February record for the highest minimum temperature at 31.3C.
Near Longreach, Blackall's lowest overnight temperature was 30.7C, making it their warmest night since records began in 1957.
"There's really high humidity, which has made it feel even hotter," Ms Sord said.
The humid and hot temperatures are expected to continue until the weekend.
"By Friday it should get a few degrees cooler and the humidity should drop," Ms Sord said.