Ayr to Cairns in northern Queensland has been inundated with heavy rainfall and flooding for days. Forecasters warn of falls of more than 100mm in the next 24 hours.

Flood-affected residents like Marion Canty are anxious their homes will again be swamped with water and mud.

"I am really worried," she told AAP.

On Sunday, Ms Canty watched the floodwaters inundate the bottom level of her Giru home, south of Townsville, as she sat isolated, without power.

She has lived through at least four floods, but the regional Queenslander said this was by far the worst.

To make matters more difficult, Ms Canty lost her husband just five weeks ago, and this marked the first flood without his support.

"I feel as though I have been left on my own," she said.

"He was the one who did everything, cleaned everything, but it is all left to me now."

Luckily, Ms Canty's daughter Kim and granddaughter Josie came on Wednesday to help clean up the thick, smelly black mud that coated the floors and the shed.

Other northern Queenslanders have not yet been able to start the clean-up as cut-off Ingham still grapples with deep floodwaters.

The town's streets and homes were submerged, and the local substation was also flooded, meaning power was cut for days.

Residents lost their water supply on Wednesday before agencies rushed to fix the facilities, with the focus now on restoring power.

With AAP.