The Bureau of Meteorology has issued a tornado warning as "very dangerous" thunderstorm cells continue to hit parts of the South Burnett and Sunshine Coast, in south-east Queensland.
There have been reports of hail the size of tennis balls in the southern inland town of Kumbia and three people taken to hospital.
At 3:30pm, the BOM issued a tornado warning for "very dangerous thunderstorms north-west of Kilkivan".
At 1:50pm, the BOM said the storms were moving in a north-easterly direction near the area south-west of Gympie, the area south of Gympie, the ranges between Gympie and Murgon, Amamoor and the ranges north of Jandowae.
By 3:15pm, one of the storm cells passed directly over Rainbow Beach.
Nearly 6,000 properties in Kingaroy and surrounding areas lost power.
Three people were injured when large hail smashed through a car windscreen.
The Queensland Ambulance Service said all three were in the same car, driving along the D'Aguilar Highway at Coolabunia, and were taken to hospital.
Coolabunia dairy farmer Damien Tessman said the storm that hit was like a cyclone.
"There's not a leaf left on a tree, lost part of a roof of the dairy," he said.
"My uncle, he's lost the top of his house. Silos have blown in and all sorts of things. It really is quite a lot of damage, definitely nothing [Ive] seen before."
Mr Tessman said the rain water was running "everywhere".
"I'm not sure how much rain we had. Feels like metres, the way that it came down," he said.
He said the rainfall had initially been a welcome sight on his dairy property, but he had "got more than we could probably handle".
Brianna Reynolds, who works at the petrol station in Kumbia, said the storm passed in less than 10 minutes.
"It ripped through pretty quick but it was heavy. Out in the main street it looked [like it was] about six o'clock in the afternoon — it was dark and then it just hit," she said.
"Very loud, couldn't hear yourself think."
Ms Reynolds said the glass louvres in the local school building would have been taken out by the storm.
"Just across the road from the service station here, there's a tree fallen over in someone's yard, by the roots, [it's] been ripped out," she said.
"Our bosses … their weatherboard and that of their houses has all been ripped out, louvres broken and all that sort of stuff."
BOM senior forecaster Jonty Hall said the storms were fast-moving and tracking towards the coast.
"They've been stronger than anything else around at the moment, and capable of producing damaging winds and very large hail," he said.
"We've seen hail reported up to tennis ball size at this stage — it's possible some of these storms could even be capable of producing hail stones larger than that, so it's certainly capable of causing damage and being quite dangerous."
Mr Hall said the cells were capable of producing damaging or even destructive winds.
"We've had some wind damage reported, lots of trees down [and] we've heard of some sheds being demolished," he said.
"These aren't likely to be the only two cells through the afternoon — there's likely to be others to developing through that Darling Downs area and extending north-east towards the Wide Bay coast and Bundaberg."
A more general severe thunderstorm warning is also current for the Wide Bay and Burnett and parts of the Central Highlands and Coalfields, Darling Downs and Granite Belt and South-East Coast forecast districts.
Heavy rain has also been falling across large parts of the Brisbane metropolitan area.