Flooding impacts to persist after record rain

Floodwaters have cut roads and isolated communities after days of rain, forcing many in central and southwestern parts of the state to flee.

Graziers in western parts of the state are expected to lose a staggering number of livestock.

Dozens of outback Queenslanders were flown to safety on Saturday as floodwaters took over their towns and properties.

The population of Adavale - a southwestern community of about 30 people - was flown out by helicopter to nearby Quilpie while those in nearby Jundah continue to evacuate. 

Central Queensland's Stonehenge and Windorah have also been hit hard after some areas recorded almost double their average yearly rainfall, triggering flooding not seen since 1974.

Personal hardship assistance has been activated, with concessional loans and freight subsidies to help primary producers in a string of western Queensland communities.

Queensland Premier David Crisafulli said the flooding would inundate hundreds of thousands of hectares.

"The peak hasn't yet hit Quilpie which means it will be a few days before places like Thargomindah and Hungerford and Cunnamulla experience the worst of the water," he said on Saturday afternoon.

The premier said floodwaters had already destroyed thousands of kilometres of livestock fencing and authorities were prioritising fodder drops to minimise livestock losses.

"You've got somewhere in the order of a million head of cattle, a million sheep who are impacted at the moment and we could see stock losses into the hundreds of thousands," he said.

Prime Minister Anthony Albanese announced more than $2 million in disaster funding for the region, while Opposition Leader Peter Dutton said he supported calling out the Australian Defence Force to assist if required.

Nationals leader David Littleproud called for large-scale federal support and said helicopters were "buzzing around like bees", dropping fodder onto properties.

"The stock losses here and right up towards Winton are going to be enormous," he told the ABC from Quilpie.

The Bureau of Meteorology said major, significant flooding was continuing across inland parts of Queensland with rain and storms sweeping across eastern parts of the state into NSW.

A number of severe weather warnings have been issued for NSW with minor flooding expected.

"We'll see heavy rainfall from Saturday afternoon and into the evening, which could produce flash flooding with six hourly totals up to 70mm possible, and high isolated falls above that," senior meteorologist Jonathan How said.

"We will see very large waves and swell push onto the coast and this may cause coastal erosion as well as damage and make conditions quite dangerous for coastal activities," he added.

The hazardous conditions are set to persist into Monday and possibly also into Tuesday.

Communities in Western Australia's north are also on high alert for the risk of flooding as ex-tropical cyclone Diane moves inland after crossing the coast on Saturday morning.