State Recovery Co-ordinator Bruce Grady said that with so many roads cut "food supply generally is of growing concern".
He said authorities had spoken with retailers on Thursday morning, asking for their help to open up supply chains.
He said the plan at this stage was to move fresh produce, water and medicine to functioning communities north of Brisbane and distribute it inland from there.
"We may have to look at creative ways to do that," Mr Grady, who's also the chief of Emergency Management Queensland, told reporters in Brisbane.
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"We have to look at moving produce by sea, plane."
He said further talks were planned for Thursday afternoon to refine plans for food drops.
"Some of those bigger centres, which will require significant volumes of food and groceries to move, may well have become a significant problem," Mr Grady said.
"Getting some early runs on the board with planning will enable us to respond before it becomes a critical issue."
He said preliminary planning for the operation could be complete by Thursday evening or Friday morning.
"We'd be in a position to move relatively soon after the planning is completed," Mr Grady said.
He said communities in need of supplies included those on the Darling Downs, from central Queensland across to the coast, and north to Cairns.
Meanwhile, two Black Hawk helicopters are bound for the flood-hit Emerald, where they'll be used to ferry food and other supplies around the town, which has been split in two by floodwaters, reporters were told.
