Queensland Premier Anna Bligh and Prime Minister Julia Gillard will on Friday visit Grantham, the small town described as the "epicentre" of the state's flooding disaster.
The crisis, which has affected three-quarters of the state including the capital Brisbane over the past three weeks, is far from over, with the residents of the border town of Goondiwindi now anxiously watching the Macintyre River as it heads for a record flood.
Ms Bligh said the Macintyre - which was at 10.62 metres on Friday morning - was expected to rise to at least 10.85 metres mid to late Friday afternoon.
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But the premier said she shared the confidence of the local mayor about the town's levee bank, which stands at 11 metres.
"This levee is a very strong levee," she told reporters in Brisbane.
"They have maintained their levee very well and have done a great job of advising town of the situation."
Flood levels in the Brisbane and Bremer rivers were falling on Friday morning, while Bundaberg was enduring its second flood in 10 days.
Ms Bligh said that in Condamine, floodwaters would peak over the weekend, slightly less than the flood one week ago, but it would still be the town's second-largest flood on record.
Dirranbandi in the state's south-west is now totally isolated and all roads to the town have been cut, Ms Bligh said.
The town could be isolated well into February and the government is working to ensure it has the supplies it needs.
The death toll remains at 15, with 61 missing, many of those in the Lockyer Valley area west of Brisbane, which was smashed by a flash flood on Monday that has devastated many of the region's small towns.
Defence, police and emergency services personnel are searching an area of more than 200km for the missing.
Ms Bligh and Ms Gillard would visit Grantham on Friday, one of the worst affected towns.
"I look forward to having the chance to meet with some of the people in this area," Ms Bligh.
"Without doubt Grantham has been the town, out of all of the 70 affected in one way or another, Grantham is at the absolute epicentre of the damage this has caused."
The premier asked that anyone considering driving to the Lockyer Valley to help with the clean-up not do so.
"I think they are very well motivated and I applaud them for their sentiments," she said.
"But they are going into an area that is still a serious search and rescue ... an area that has almost no services, and people just turning up with three or four truckloads of people could actually be a hindrance, not a help."
In Brisbane, where the river peaked on Thursday at 4.46m, the levels have dropped to 2.7m and the big clean-up is beginning.
The water has left more than 26,000 homes affected, with 11,900 homes completely under water and another 14,700 are partially flooded.
