One man is dead and a woman is missing as rainfall in Queensland carries away cars, floods suburban streets and forces school closures.
A 75-year-old kayaker was found dead in the swollen Mary River in the Sunshine Coast hinterland amid heavy rains across the state.
Meanwhile, the search for a woman who disappeared in the Gold Coast hinterland has resumed after being suspended due to rain.
Yang Chen, 26, was reported missing on Wednesday morning by a man she was walking with near Gorge Falls in the Tallebudgera Valley.
He told police he lost sight of her and it's not clear if she became lost, fell, or walked out of bushland to nearby roads.
More intense rainfall which could lead to life-threatening flash flooding is still to come, the Bureau of Meteorology has warned.
On the Gold Coast, 177.8mm was recorded in the 24 hours before 9am on Thursday, with 46.8mm in Brisbane and 200.8mm at Nambour, on the Sunshine Coast.
More than a dozen rescues were carried out in the 24 hours to 4am on Thursday, most of them on the Sunshine Coast.
The heaviest falls are expected to continue throughout the northern Gold Coast and Scenic Rim where roads have been closed.
Footage posted online shows ferocious rapids running down the road at Tamborine Mountain, with a wall of water inundating shops.
A Mt Coolum nursing home was evacuated, and a mother had to rescue her son on the Gold Coast after he was swept from a footpath into a river.
Warnings for coastal catchments between Bundaberg and the NSW border are in place.
This includes a major flood warning for the Condamine River, downstream of Warwick in southern Queensland, and the Coomera River.
Large swells from ex-Tropical Cyclone Uesi are expected to pummel beaches south of Fraser Island.
Gold Coast and Sunshine Coast beaches, and theme parks have been closed.
Eighteen schools are also shut, along with 15 childcare centres.
About 1440 customers were hit by power outages in Brisbane city, Energex reported on Thursday afternoon.
A severe storm warning also takes in the Central Highlands and Coalfields, Capricornia, Maranoa and Warrego and Southeast Coast regions.
In the state's far north, residents are sweltering in severe to extreme heatwave conditions expected to carry into the weekend, with February temperature records expected to tumble.
Temperatures are expected to reach 44C in Mt Isa at the weekend.