The Bureau of Meteorology has issued a warning for more heavy rainfall and potentially life-threatening flash floods from Noosa down to the NSW border.
The coastal trough over southeast Queensland is expected to deepens on Monday and into Tuesday.
Rainfall totals up to 250mm are possible, although conditions could be patchy over over coastal areas with rainfall totals of 50mm-100mm in some areas.
"Intense rainfall leading to dangerous and life-threatening flash flooding is possible with thunderstorms with six-hourly rainfall totals up to 250mm," the bureau warned.
A major flood warning is in place for Myall Creek along with a moderate warning for the Bokhara River and a minor warning for the Condamine River.
"Further thunderstorms and showers are likely during Monday, which may cause renewed river level rises and possible flooding in the Condamine and Balonne River catchments," the bureau said on Monday.
Seqwater late on Sunday warned of possible flood releases from the Wivenhoe, Somerset and North Pine dams in the nex t 48 hours due to the forecast rainfall.
The authority warned people downstream of the dams to avoid deep and fast-flowing water near floodplains and waterways.
The bad weather comes as communities continue to clean-up after the deadly foods triggered last month by the state's wettest February in 130 years.
Weeks after the deluge, the Brisbane River has reopened to recreational boating after some 2000 tonnes of debris were removed from the river.
Citycat ferry services remain suspended and are not expected to resume until April, according to Brisbane City Council.
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