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Southeast Queensland's devastating floods have killed a dozen people, and authorities believe the disaster will cost the state more than $2.5 billion.

The death toll rose to 12 when a man's body was found after his car was swept into floodwaters in the South Burnett Region on Sunday. Another man is still missing.

Queensland Treasurer Cameron Dick said the floods, which have been going for two weeks but peaked last weekend, will cost the state at least $2.5 billion.

Treasury estimates the cost of fixing damaged public infrastructure like roads, bridges, railways and ports will be at least $500 million, while the insurance claims on damaged homes and businesses are likely to top $936 million.

Mr Dick said the floods were also expected to wipe 0.25 per cent, or $1 billion, in economic growth from the current quarter.

"Although the weather event was pretty short, it was only about three days in duration, the cost of this weather event will be very significant," he told reporters on Monday.

Mr Dick said the $2.5 billion estimate is only preliminary and he expects the damage bill will increase, particularly as people cleaning up their homes and businesses lodge insurance claims later and councils make more detailed assessments.

He said the 2022 floods won't cost as much as the 2011 floods or Cyclone Debbie in 2017, Oswald in 2013 or Yasi in 2011.

"But for people who are throwing out treasured possessions or are hosing out mud from their homes in stinking heat, it doesn't really matter which flood costs more," Mr Dick said.

The treasurer has ruled out any new taxes or a levy, like the one brought in after the 2011 floods, to pay the bill, and he expects the state to return to surplus in 2024/25 as planned.

"We're holding tight to that promise, notwithstanding the natural disasters, but we never know what's around the corner," he said.

Federal Government Services Minister Linda Reynolds said 89,000 disaster claims worth $104.8 million have been granted in Queensland over the past seven days.

"The significant number of claims paid reflects the size and scale of this flood disaster," she said in a statement.

More than 1350 Defence Force personnel are helping with the recovery effort, focusing on the towns of Gympie, Gatton, Esk and Grantham as well as suburban Brisbane and Logan.

Commander of Operation Flood Assist, Major General David Thomae, said the ADF has been involved from February 25 when the Commonwealth activated it's disaster plan.

Search and rescue missions continued in Queensland in the days that followed before the disaster shifted to northern NSW where reserve soldiers supported air operations, he told a briefing on Monday.

The danger from the floods remains, with soaked catchments ripe for flash flooding and the Bureau of Meteorology forecasting possible severe thunderstorms later this week.

A line of storms triggered flash floods across the broader region again on Sunday night, including the South Burnett area where the man in his 60s died.

A woman, also in her 60s, managed to get out of the car and hang onto a tree branch before being rescued by onlookers.

Another three people, a man in the South Burnett area and two women on the Gold Coast, were rescued after their cars were swept away by flash floods on Sunday.

An elderly man remains missing after falling from a boat into the Brisbane River near Breakfast Creek nine days ago.

© AAP 2022

The humidity and and unrelenting rain that's characterised summer and the start of autumn have created ideal conditions for wild mushrooms to sprout and authorities are warning not to risk eating the potentially poisonous fungi.

The NSW Poisons Information Centre has received 73 calls about mushroom exposures this year.

It says 45 calls were about accidental exposures, with more than 80 per cent of them occurring in children under five.

There were 16 calls about adults who ate wild mushrooms as food and 10 calls about mushrooms being ingested for "recreational purposes".

NSW Poisons Information's Genevieve Adamo says the number of adults choosing to ingest the possibly poisonous mushrooms is alarming.

"Mushrooms found in the wild, even in people's own backyard, are not safe to eat," she said on Monday.

"For children, mushroom ingestion is often accidental. But for adults, we know that ingestion is usually intentional.

"People don't realise that this could be deadly," Ms Adamo said.

Many mushrooms growing in the wild can cause serious poisoning, including the Death Cap mushroom, which - if eaten - can lead to potentially fatal organ damage.

Poisonous mushrooms in Australia can look like edible mushrooms from Europe and Asia and changes in the appearance of mushrooms during the life cycle make it difficult to identify safely.

"Toxic mushrooms can grow in a spot where previously only edible mushrooms grew.

"The fact you have safely eaten mushrooms growing in that spot previously is no guarantee that it is safe to pick mushrooms again," Ms Adamo warned.

"Eating wild mushrooms is never worth the risk."

© AAP 2022

A state funeral will be held in Victoria for Shane Warne after the cricketing great died of a suspected fatal heart attack in Thailand on Friday.

Victorian Premier Daniel Andrews confirmed on Sunday Warne's family had accepted the state government's offer, with more details in coming days.

"It will be an opportunity for Victorians to pay tribute to his contribution to his sport, to our state and the country," Andrews said.

Warne's manager earlier revealed the cricketer had finished a "ridiculous" diet of consuming only fluids days before his death

"He did go on these ridiculous sort of diets, and he was just finished with one," James Erskine told Nine's Weekend Today on Sunday.

"It was a bit all or nothing. It was either white buns with butter and lasagna stuffed in the middle or he would be having black and green juices.

"He obviously smoked most of his life. I don't know. I think it was just a massive heart attack."

Yuttana Sirisombat, superintendent at the Bo Phut police station, told reporters Warne had been suffering chest pains before arriving in Thailand. He also had asthma and had seen a doctor about his heart.

The death of the 52-year-old 145-Test veteran on the island of Koh Samui is not being treated as suspicious.

Warne was staying in a private villa with three mates, one of whom performed CPR after finding him unresponsive when he did not show up for dinner.

He was taken by ambulance to Thai International Hospital and later his body was transferred to Ko Samui Hospital.

Erskine told Fox Cricket Warne was only three days into a planned three-month holiday and alone watching cricket when he fell ill.

His friend Andrew Neophitou, who was among the group staying in the same villa, went to check on him.

"They were going to have a drink ... or go and meet someone to go out and have a drink at 5 pm and Neo knocked on his door at 5.15 pm because Warnie is always on time," Erskine said.

"He went in there ... and then realised something was wrong. And he turned him over and gave him CPR and mouth-to-mouth, which lasted about 20 minutes and then the ambulance came."

Australia's ambassador to Thailand Allan McKinnon said police and hospital staff in Ko Samui were working to get Warne's body back to Australia quickly.

"They have been very compassionate, very efficient and very understanding," he said.

Sirisombat says Warne's body will be moved for an autopsy in the main state hospital in Surat Thani province on Sunday.

A forensic team has inspected the villa where Warne was found and his friends have given statements to police as part of standard procedure.

Erskine told Weekend Today Warne's family was understandably devastated with the cricketer's children - daughters Brooke, 24, and Summer, 20, and 22-year-old son Jackson - in "complete shock".

Meanwhile tributes continue to pour in from all walks of life, with newspapers, celebrities, politicians and adoring fans lining up to recall their memories of the legendary legspinner.

Others left flowers, meat pies, beers and cigarettes at his statue outside the MCG throughout Saturday, where the southern stand will be renamed the S.K. Warne Stand in his honour.

Hollywood star Russell Crowe tweeted he was having a hard time accepting the news.

"Genius player. Grand company. Loyal friend," he tweeted.

Rolling Stones frontman and passionate cricket fan Mick Jagger tweeted: "He brought such joy to the game and was the greatest spin bowler ever".

With agencies.

© AAP 2022