UPDATE: THE Bureau of Meteorology has warned of major flood levels in Tiaro overnight on Wednesday, and moderate flood levels for Maryborough on Thursday.
Major flooding is occurring along Tinana Creek at Bauple East with levels expected to remain high until at least Thursday.
River levels are rising at Tinana Barrage but levels are expected to remain below moderate flood levels.
Minor flood levels are rising at Maryborough, with a flood peak expected during Thursday, the bureau advised about 7.30pm on Wednesday.
The latest predictions on river heights are as follows:
Tiaro: Major flood peak of around 16.5 metres overnight Wednesday.
Maryborough: Peak below the moderate flood level (8 metres) during Thursday.
Peaks will be refined as upstream peaks are observed.
EARLIER: The Fraser Coast Disaster Coordination Centre was opened on Wednesday morning as Maryborough prepares for the Mary River to reach up to 7.5m.
Floodwaters were at 6.45m at about 9am and will continue to rise until Thursday morning.
The Fraser Coast Council said the temporary levee would not be erected in the Maryborough central business district.
A Bureau of Meteorology warning issued early on Wednesday morning showed Tiaro would see a major flood level of 14.5m overnight.
EARLIER: The SES will be doorknocking homes and handing out flyers on Wednesday morning in the Pocket area in Maryborough to warn residents to prepare to evacuate.
Fraser Coast Mayor Gerard O'Connell said some homes were expceted to be flooded in the lower Pocket area with the Mary River expected to reach 7m on Thursday.
"We asked the SES to start a doorknock through that area," he said.
Cr O'Connell said businesses on lower Kent St, such as Dale and Meyers, were also under threat of flooding.
He said he believed the Wallace Caravan Park near the Lamington Bridge had started moving cabins away from the river edge on Tuesday.
Cr O'Connell said the Lamington Bridge was closed about lunchtime on Tuesday after the rails were removed and access to the Granville Bridge was cut about 10.30pm on Tuesday.
He said the Granville Bridge itself was not expected to go underwater.
Cr O'Connell said depending on rainfall, which seemed to be easing, the river shouldn't exceed 7m.
But he said the Bureau of Meteorology had been predicting heavy rain towards the end of the week and the weekend so he was keeping an eye on that.
EARLIER: The Mary River is expected to reach a minor flood level about 7m on Thursday morning, the latest Bureau of Meteorology warning predicts.
"The peak will be refined once upstream peaks are observed," the bureau said.
In an update issued about 4.45am on Wednesday, the bureau said rainfall rates had eased in the Mary River catchment.
"Major flood levels are currently steady at 18.39m at Gympie and a minor flood peak is expected at Maryborough during Thursday," the bureau said.
A severe weather warning was cancelled by the bureau at 3.35am on Wednesday morning.
"Very heavy rain which may lead to flash flooding is no longer expected and so the warning is cancelled," the bureau said.