Bundaberg in southern Queensland is facing the prospect of more flooding, with the Burnett River expected to peak at five metres today.
However, the prediction is well below last month's record 9.6 metres.
Authorities say there will be some flooding in streets and sports fields but no homes will be affected.
Bundaberg has already passed its average rainfall for March with more than 130 millimetres falling over the weekend.
Bundaberg Mayor Mal Forman says the Burnett River is heavily swollen and there could be flooding downstream today.
"We could expect a peak of five metres during the day - it will cause some low-lying flooding in some streets and roads around the CBD and the sports fields," he said.
"There are also a couple of businesses in low-lying areas that will have inundation into those.
"There will be no houses affected by it."
Weather bureau spokesman Dean Narramore warns the region is set for more heavy downpours.
"We've got an additional surface trough hanging around the central Queensland coast, around the Capricornia coast, and the central coast, up to almost the tropical coast around Townsville," he said.
"That's supposed to hang around for the next couple of days.
"Mackay had 120 millimetres last night and some areas had even more than that through part of the region due to thunderstorm activity."
Fraser Coast Mayor Gerard O'Connell says the latest wet weather will delay the clean-up effort in Maryborough.
Councillor O'Connell says the Mary River is continuing to drop after swamping 30 properties last week.
He says the weekend rain will not affect river levels but crews have only been able to start minor repair work.
"The ground is really very wet, as everyone knows," he said.
"In terms of fixing up the damage and the infrastructure and things like road pavements, we need to see that dry out before we can really get involved and get the fix-up and clean-up under control."
Meanwhile further south, the weekend downpours also has authorities monitoring river levels in flood-weary Gympie.
The Mary River is rising again and the Kidd Bridge may go under later today, but there should not be any major flooding.
Mayor Ron Dyne says flood-affected businesses are understandably cautious.
"We've had a fair bit of rain, especially in the upper reaches, and the river is still rising," he said.
"Once you've had water inside at a certain height, it takes a while for the businesses to dry out.
"There was a few rumours about that there was going to be more rain and potentially more flooding and people took the cautious approach to let the businesses dry out."
The weather bureau says Brisbane has already received more than half of its average yearly rainfall.
Mr Narramore says heavy downpours at the weekend pushed up the figures.
"We recorded about 100 millimetres through the Brisbane city and up to 120 to 140 millimetres in some of the northern and also the southern Brisbane suburbs as well," he said.
"The hinterland around the Sunshine Coast and the Gold Coast also recorded up to 150 millimetres.
"But the good news is it is easing up and the system that brought us most of that rain is actually moving westwards, which is a bit unusual."
© ABC 2013
17:31 EDT The Bureau of Meteorology (BoM) has issued a severe thunderstorm warning for most parts of New South Wales, saying heavy rainfall and damaging winds are likely.