Major flood warnings remain in place for nearly a dozen rivers in NSW, as the swollen Murray River threatens to inundate communities on both sides of the Victorian border.
The Bureau of Meteorology says major flooding is expected at Echuca in Victoria and Moama, a town in the NSW Riverina district, with flooding there likely to be as bad as or worse than the 1993 flood - the area's second-biggest on record.
Around 200 residents at an Indigenous community near Moama have been told to evacuate by midday on Monday and people living in the Moama caravan were told to leave by 6am.
Despite clear skies on the weekend in NSW, the BoM's Dean Narramore says floodwaters are still rising.
"We have major flood warnings right across inland NSW and northern Victoria," he told ABC on Monday.
"Today, we're going to see a number of locations peak."
Thousands of residents in Forbes, in the NSW central west, are affected. Some were evacuated before the Lachlan River peaked on Friday night and part of the CBD are still inundated.
Major flooding at Warren is expected to continue and more rain could cause further rises on the Macquarie River, threatening more severe flooding at Wellington and Narromine in the coming days.
"We have major flooding continuing on many of the inland areas around Warren and Wee Waa and parts of the Darling and rainfall, (with) more rain coming in the coming days, which will only exacerbate the many ongoing flood issues at the moment," Mr Narramore said.
People in South West Narrandera were ordered to evacuate before 6pm on Sunday after the Murrumbidgee River's main flood peak passed through Wagga Wagga last week and headed downstream, with moderate flooding expected downstream at Darlington Point from Thursday.
The Murrumbidgee has passed the minor flood level at Balranald while major flooding is not expected to reach the town of Hay until late October, the BoM says.
Major flood warnings remain in place for 11 rivers in NSW and the SES have responded to 110 calls for help and conducted two flood rescues in the past 24 hours.
Another storm system is forecast to develop over central Australia on Tuesday, bringing widespread 25-50mm over much of inland NSW and thunderstorms to eastern states by mid-week.
"This is a lot less than what we saw, but with everything now so wet and saturated, this is going to lead to renewed river level rises on many of our already flooded rivers. Particularly as we get in towards that Thursday and Friday," Mr Narramore said.
October rainfall records have been set in parts of inland NSW, including at Broken Hill in the state's far west.
Sydney has also recorded its wettest year on record after only 10 months.
Prime Minister Anthony Albanese announced on Sunday four more areas were eligible to apply for federal financial assistance.
The addition of the Central Coast, Coonamble, Goulburn-Mulwaree and Parkes bring the total number of NSW local government areas with assistance available to 31.
© AAP 2022