An army of more than 22,000 volunteers are set to march into action and continue Queensland's mammoth flood cleanup efforts.
So far 86 communities in the state have been affected by flooding, with parts of Brisbane submerged on Wednesday.
The cleanup in the city got under way on Friday and will continue over the weekend, with Brisbane's Lord Mayor Campbell Newman saying around 6000 volunteers will lend a hand.
State-wide more than 22,000 people have registered with Volunteering Queensland to help.
There will be 1200 defence force personnel involved.
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"My message to the community is this is a marathon, not a race. It will take time to clean up so please pace yourselves and be careful," Mr Newman said.
"For those who can't help this weekend, don't worry as there will be many more days when your help will be much appreciated."
Volunteer registration centres have been set up at Doomben Racecourse, Boondall Entertainment Centre, Mount Coot-tha Botanic Gardens and the MacGregor High School Assembly Hall.
Flooding has affected more than 26,000 Brisbane homes, with 11,900 completely submerged and another 14,700 partially flooded.
At Grantham, the epicentre of this week's Lockyer Valley and Toowoomba floods, a massive search effort for the missing covers 200km of waterways.
The death toll rose to 16 on Friday following the discovery of a woman's body near Grantham.
Fifty-three people remain unaccounted for, including 12 for whom police hold grave fears.
