The Bundaberg region in southern Queensland is bracing for another flood peak today.

The Burnett River is expected to reach 5.5 metres tonight, which is two metres lower than the levels seen two weeks ago.

Bundaberg Mayor Lorraine Pyefinch says low lying areas in the east, south and north will be affected.

"I just want to encourage people to stay as calm as possible," she said.

"This is not the same event that they experienced 10 days ago.

"They can be assured that we are only talking about a limited number of properties that will be affected in very low-lying areas."

The army will also airlift food into Bundaberg today to restock dwindling supplies.

There have been reports of essential food like bread and milk running low in Bundaberg, Hervey Bay and Gympie because of panic buying.

The military will help distribute the food. Colonel Luke Foster says the supplies will be distributed to stores.

"We've been working with Emergency Management Queensland who have asked us to help with supplies of food, emergency supplies and the like through a couple of locations in Queensland," he said.

"One of those locations will be Bundaberg where we will do four sorties of C130s into Bundaberg."