Authorities in the Australian state of Queensland said parts of the state received more than 600 millimetres (24 inches) in 24 hours.

With heavy rains continuing, residents in flood-prone areas of Townsville were told to evacuate their homes by midday Sunday.

Rising floodwaters forced the closure of the local airport and Townsville University Hospital to delay elective surgeries.

The state's premier David Crisafulli warned Sunday more rain was forecast which could result in "record rainfalls".

The weather conditions were unlike anything the state had experienced "for a long time", Crisafulli said.

"It's not just the intensity, but it's also the longevity of it," he told the ABC national broadcaster earlier on Sunday.

According to police a woman died Sunday after the boat she was in capsized in the rural town of Ingham, around 230 kilometres (142 miles) from Cairns.

"Take the precautions, prepare for the worst, listen to the advice -- please don't discount this," Crisafulli said.

The environment department has warned people to be on the watch for crocodiles that may move about in "search of calmer waters".

"Expect crocodiles in all north and far north Queensland waterways even if there is no warning sign," it said a statement cited by local media.

The heavy rain will continue in the coming 24 hours, with the Bureau of Meteorology warning some areas will receive 450 millimetres (18 inches) of rainfall.