Australian Prime Minister Anthony Albanese says record-breaking floods have had a "devastating impact" on the country's far-flung west.
Floodwaters are rising in the Kimberley region of Western Australia, with some towns expected to be cut off for the next few days.
Emergency services have called the unfolding disaster "the worst flooding event" the state has seen.
Albanese said it had been difficult to reach some of the waterlogged areas. "These floods are having a devastating impact," he told reporters.
"Many of these communities are communities that do it tough. The resources simply aren't there on the ground."
The Kimberley region covers a tract of land three times larger than the United Kingdom but has a population of less than 40,000.
Australia has been repeatedly lashed by heavy rain in the past two years, especially after frequent flooding in the country's east due to La Nina climate cycles, typically associated with increased rainfall.
Back in July, tens of thousands of Sydney residents were ordered to evacuate their homes when floods swamped the coastal city's fringe.
An east coast flooding disaster in March caused by storms in Queensland and New South Wales claimed more than 20 lives.
According to the warnings issued by Australian researchers, climate change is amplifying the risk of natural disasters.