For more than 150 years, Anne-Maree Lloyd's family homestead had never been inundated by floodwaters.
"This time it went through it .. it looks like a metre through our house," Ms Lloyd told AAP.
Most of their machinery and all of their vehicles have been flooded, forcing the southwest Queensland homestead to be evacuated.
Working dogs were left on a nearby ridge and have to be fed by food drops from a helicopter.
About 200km of fencing around the property is believed to have been destroyed.
The Jedburgh property near the Barcoo River went under as floodwaters twice the size of Victoria impacted Queensland's west.
Entire towns have been evacuated while another constructed a levee bank to protect its community as many headed for higher ground.
Many believed the flooding in the region was the worst in more than 50 years and would last weeks, sparking fears for mass livestock losses.
"We won't get back into our house probably for a couple of weeks. We don't know what we're walking back into," said Ms Lloyd, who evacuated to Longreach with her husband.
"We've never seen anything like it."
About 70 people were evacuated from Thargomindah, about 1000km west of Brisbane, on Monday morning as the flooding threat spread in the sodden state.
A levee bank protecting the community broke, prompting repair work crews to launch recovery efforts on Monday.
"The area of land covered by flood water at the moment in western Queensland is double the size of Victoria, that's what we're talking about," Police Minister Dan Purdie told reporters.
Thargomindah expected seven metres of floodwaters in coming days, AgForce general president Shane McCarthy said
"There's unprecedented levels of flooding out there," he told AAP.
"A lot of those communities have just been inundated with water that they've never seen before - 1974 was generally the benchmark, we've gone past that and a bit," Mr McCarthy said.
Many in the state's central and southwest have been evacuated from floodwaters in recent days, with outback town Adavale's population of about 30 relocated by helicopter.
Windorah and Quilpie in the southwest are also among those impacted with major flood warnings current for a string of rivers across the region.
"This floodwater is very slow to subside, so we are likely to see these major flood warnings continue for quite some time," the Bureau of Meteorology's Jonathan How said.
Southwest residents had complained that there was no weather radar available between Alice Springs and Charleville, claiming the bureau was "flying blind" in the region when days of downpours hit.
Opposition leader Peter Dutton flew out to Thargomindah on Monday on the campaign trail, vowing to commit $10 million towards a radar for the region if elected in May.
The federal and state governments had already activated personal hardship assistance along with concessional loans and freight subsidies to help primary producers in a string of western Queensland communities.
But the devastating flooding's true impact may not be known for some time when water levels finally recede.
"They won't even be looking at the stock losses at the moment," Mr McCarthy said.
In NSW, there are concerns for an elderly man who went missing in flooding when he tried to drive across a flooded causeway 100km west of Taree late on Saturday night.
Communities along the Paroo and Warrego Rivers were warned they may be cut off for up to six weeks.
