While flooding has eased in some areas, officials have declared new regions in southwest Australia as disaster areas.
State Emergency Service volunteers were monitoring towns and communities south of Wagga Wagga, bordering Billabong Creek, the Australian Broadcasting Corp. said.
"After further releases from the Burrinjuck Dam we're expecting minor flooding at Gundagai, and moderate flooding in Wagga Wagga and minor
flooding downstream," said SES spokesman Phil Campbell.
SES Minister Steve Whan said many towns' sustained severe property and infrastructure damage from floods arising from heavy late-summer rainstorms.
Giving the regions a "disaster" zone classification allows them to receive emergency funding, the report said.
"That's going to help individual householders who are on low incomes to get a little bit of immediate assistance with their damage, and very importantly help the shires to overcome and fix some of the damage to infrastructure," Whan said.
Tony Casey, also from the SES, said the floods are the biggest in decades.
"These are all significant effects for the community. It's just unfortunate with the good rain, there's come this really quite significant flood, possibly the biggest in 30-odd years," Casey said.
The report did not give any damage estimates, nor did it say if anyone has been hurt or killed in the flooding.