A flood alert is in place for many areas of Queensland where widespread rain has blocked roads and isolated towns.
There is a severe weather warning for flash flooding for the Channel Country, the Peninsula, north tropical coast and the Herbert and Lower Burdekin, the ABC reports.
Flood warnings are in place for western Queensland and Gulf rivers, while Bedourie and Windorah have already been cut off.
In the Diamantina Shire falls of up to 200 millimetres have been recorded and roads are closed.
Severe weather forecaster Michael Knepp told the ABC that Sapphire, west of Emerald, received 75 millimetres of rain in an hour which is only expected every 20 to 50 years.
He said some areas were receiving heavy rainfall on Sunday and others will be expecting heavy rainfall over the next 24 to 36 hours," he said.
Emergency Management Queensland expects there will be widespread flooding in the Channel Country in the coming days.