More people are being ordered to leave their homes on the Murray River in southern NSW this evening as floodwaters continue to rise.
The New South Wales Premier says emergency services are particularly concerned about the state's south and west, where major flooding is expected in the coming days.
Dominic Perrottet said Moama was of "major concern" with more than 300 people being evacuated from the area over the past few days and 3,000 more on stand-by to evacuate over the next 24-48 hours
"Our dams are full, our rivers are full so we do expect this to be a difficult time," the Premier said.
The State Emergency Service currently has 73 warnings in place across the state, with the latest including for people to leave parts of the Murray Valley National Park and Backwater Creek area by 5pm Tuesday.
Eight streets in East Moama have until 1pm on Wednesday to leave.
Emergency Services Minister Steph Cooke said the State Emergency Service had delivered more than 125,000 sandbags to the community.
"The RFS has dispatched two base camps and they will be set up over the days ahead to accommodate up to 550 people, including our volunteers, who will continue to move into that region over the next day," she said.
Ms Cooke said emergency services had nine aircraft already in place in high risk areas across NSW as well as five high clearance vehicles.
"We have called upon the ADF for additional assistance and we will see up to 180 ADF personnel out into high-risk communities, starting today and in the days ahead, particularly into the western parts of NSW," she said.
NSW Rural Fire Service chief superintendent Heath Simpson said six semi-trailers worth of equipment had arrived at the base camp in Deniliquin and about six more were on the way.
He said about 200 workers were staying there, to help local communities respond and recover to the ongoing flood situation.
"As the operation continues we have the ability to scale up and go larger if we need to," Mr Simpson said.
He said said the camp had the capacity to be set up for several weeks.
"It's able to keep running for as long as it's needed but that will all depend on the continuous flooding and how long that lasts."
'Intense' system forming
Jane Golding from the Bureau of Meteorology said four significant rain systems had already affected the state and there was more to come over the coming weeks.
"It does look like there'll be a quite intense low-pressure system dragging some moisture from the tropics and moving through from the north-west of the state to the east between Wednesday and Friday," she said.
"We are expecting that system to be accompanied not just by persistent showers and rain but also thunderstorms and potentially some severe thunderstorms."
She said in the North West Slopes and Plains and the Central West Slopes and Plains there was the potential for flash flooding due to intense bursts of rain from thunderstorms, which could also bring severe wind gusts and giant hailstones.
Ms Golding said the Bureau had also issued a flood watch for much of inland NSW, as well as Wollombi Brook and the Lower Hunter River.
She said communities that had already experienced flooding, including Forbes, should be prepared to face further river rises.
Ms Golding said communities that had escaped major inundation so far could also be affected by this week's weather system, particularly in the Gwydir, Upper Macintyre and Namoi rivers in the state's north and the Bogan River in the Central West.
Danger for 'weeks to come'
The SES said it was also worried about flooding in the Murrumbidgee River at Narrandera, in the Edward River in Deniliquin, and in areas further west, including Warren, Wee Waa, Bourke, Louth and Tilpa.
SES Assistant Commissioner Sean Kearns said in the last 24 hours there'd been six flood rescues across the state.
"Over the next week we are going to see further flooding," he said.
"This situation is not over and it's important to understand this is going to continue for several weeks to come.
"The rivers aren't going to respond how you think they are, because the rivers are already at high levels.
"We're going to see further rainfall that's literally just going to run off straight into the river systems."
