Weatherzone meteorologist Josh Fisher said Monday afternoon's rain would intensify overnight.

"The heaviest rain is going to peak over the south-east [Tuesday] as that low moves from the interior," he said.

"We'll see the rain pick up tonight in Brisbane, with heavy rain tonight and into tomorrow and Brisbane could see as much as 80 to 100 millimetres from tonight to tomorrow."

Mr Fisher said the heaviest rain was expected around the Sunshine Coast and Hervey Bay.

"Brisbane won't see the worst of it, but some places to the north might see upwards of 200 millimetres," he said.

Fellow Weatherzone meteorologist Brett Dutschke said Queensland's western interior had seen record rainfall, with parts of the state cut off by floods.

Birdsville had seen more than their entire average annual rain fall in just two days, he said.

"Communities are being left isolated with more than 200 millimetres falling across the region in the last few days, the heaviest in almost a century in some cases," Mr Dutschke said.

"Birdsville has received more than 220 millimetres since rain started on Saturday night, exceeding their annual average by more than 40 millimetres."

Mr Dutschke said it was the biggest rain event seen in Birdsville in 93 years.

"And it's not far off the record rain amount set in 1917," he said.

"In March that year, 267 millimetres fell during a three-day downpour.

"The 168 millimetres that fell in the 24 hours to 9am today is the highest daily total more than 100 years of records."

Mr Dutschke said Birdsville could expect another 10 to 20 millimetres over the next few days.