Queensland Premier Anna Bligh has joined the thousands of volunteers out today cleaning up flood-ravaged Brisbane and Ipswich.

Ms Bligh donned a pair of gumboots and joined members of her running group in a working bee at an apartment complex in the inner-city suburb of West End in Brisbane's CBD.

Covered in muck, Ms Bligh wielded a shovel to help clean out one of the courtyards in the complex and was too busy to talk to the media.

Ms Bligh is one of many who have given up their weekend to continue the mammoth clean-up, which is expected to take months.

Ipswich Mayor Paul Pisasale says the emotional strain is taking its toll.

"I think people are tired now, they're fragile and there's a lot of issues in regards money and support," he said.

Southern Qld

Meanwhile, the southern inland town of St George is preparing for a second flood peak in the Balonne River tomorrow but it is expected to be lower than the one a fortnight ago.

There has also been no let-up in the effort to find the people missing from the devastating floods in the Lockyer Valley, west of Brisbane.

About 400 police, defence, State Emergency Service (SES) and fire service personnel are involved in the search, clean-up and recovery.

The Queensland floods have claimed more than 30 lives since late November and 20 of those died in the south-east.

Nine people are still missing.

Port reopens

In a good sign for the State's productivity, authorities have reopened the Port of Brisbane where restrictions were imposed during the floods.

The Harbour Master and Maritime Safety Queensland have lifted all restrictions on shipping movements and it is business as usual.

In the past week surveyors have found 62 dangerous hazards within the ports boundaries and have retrieved all but two.

Among the array of sunken objects, were trees, boats, yachts and pontoons.

- ABC/AAP