The far north and west are expected to be the hardest hit areas.
The Bureau of Meteorology (BOM) said these parts of Queensland could see up to 10 times their average falls for May, with totals of 200mm or more expected.
Meteorologist Miriam Bradbury told Today Queenslanders can expect to see more rain from tomorrow, but the main period of concern would be between Tuesday and Thursday this week.
“That’s when we look at the heaviest falls, with the areas of greatest concern being the inland parts of western and southwestern Queensland, which also go all the way up the Capricornia coast. ”
Some areas could see rainfall totals between 50mm and 150mm each day with possibly higher falls if thunderstorms develop, Bradbury said.
“You’re talking about potentially 300mm of rain,” she said.
A number of catchments in southwest central Queensland were looking at river flooding with roads cut off and some communities still isolated.
“This rainfall that we are expecting this week is of concern to these communities as well as the east coast watersheds which could also see further flooding,” Bradbury said.
“Essentially we are looking at a renewed risk of river flooding across large parts of Queensland with the rain coming.”
On Friday night, a man was rescued after his car got stuck in floodwaters in the Sunshine Coast hinterland.
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Emergency services said the driver became trapped on a causeway in Conondale around 7 p.m. after the bridge was submerged in water.