Fifth person killed in Queensland storm

A fifth person has died after after southeastern Queensland was hit by extreme weather.

Just hours earlier an elderly man, whose car was swept away by floodwaters, became the fourth person killed.

Police said the 75-year-old man's vehicle was caught by flooding near Burpengary Creek on Friday night.

A swift-water rescue team was able to rescue a 68-year-old woman who was clinging to a tree, but the man was found dead several hours later.

Two adults and an eight-year-old boy were killed on Friday when their car was swept away by floodwaters in Brisbane after a ferocious storm hit the region.

The five people who perished during Queensland's wild weather were in cars attempting to cross flooded roads, police say.

"It's unfortunate that with events like this, we again need to highlight to the community the dangers of entering flooded road waters. If it's flooded, forget it," Inspector Lee Jeffries said.

"The reports that I have is that the roads were well and truly flooded at the time and vehicles have entered flooded roads."

Queensland Premier Annastacia Palaszczuk confirmed the deaths on Friday night, telling reporters that a man, a woman and a young child had been killed.

"On behalf of all Queenslanders we express our deepest sympathies. This is a tragedy," she said.

Firefighters were called to Dances Road at Cabooolture about 5.35pm to reports of a submerged car but were unable to save the occupants.

Some drivers resorted to abandoning their cars after becoming stuck in traffic gridlock due to the storm conditions.

The Anzac Test between Australia and New Zealand at Suncorp Stadium was also officially been postponed until Sunday due to the weather.

• Queensland ambulance told girl was struck by lightning

• Three killed in Queensland floods: Palaszczuk

• Anzac test called off