Plans are underway to evacuate a community isolated by floodwater under escort and more emergency warnings have been issued as the NSW flood crisis tests exhausted communities.
It comes as the agency said it was confident a record flood at Condobolin had peaked two days ahead of schedule.
NSW Emergency Services Minister Steph Cooke said the emergency response effort on the Lachlan River was being concentrated at Euabalong and Condobolin after flooding upstream at Forbes fell below major levels.
The SES has ordered residents in parts of West Condobolin to leave immediately before roads were cut by floodwaters.
A 4-kilometre makeshift levee of dirt and sandbags, now known as "the great wall of Condo", is protecting the town's central business district from the river which was thought to have peaked at 7.59m overnight on Sunday.
That peak is 20cm higher than the town's previous worst flood on record, but below a previous forecast peak of 7.8m on Wednesday.
"It will continue downstream through the Lachlan and approach the community of Euabalong which has also been in major flood for many, many weeks now," Ms Cooke said.
SES Lachlan River incident controller Ken Murphy said the Euabalong levee was stabilised with sandbags.
"Euabalong is the only area where we have concerns with the levee, other major levees that are protecting townships along the Lachlan River — they are also under review," he said.
Mr Murphy said the clean-up was continuing at Forbes, where more than 400 damage assessments had been conducted.
Escort planned for evacuation
Fresh evacuation orders have also been issued for two towns in the Riverina in the state's south.
Residents in the town of Moulamein, where the Edward River and Billabong Creek meet, are being told they will have one opportunity to leave on Tuesday afternoon, under an escort.
"It is a very dynamic and dangerous situation in Moulamein and it's our advice to evacuate and remove as many people as we can," SES Southern Zone incident controller Shane Hargrave said.
The town of just under 500 people is already isolated due to floodwater and the SES is concerned residents who stay could be isolated for several weeks due to the impact on road access.
Further east on the Edward River, residents in 10 streets in Deniliquin have been given until 10am Wednesday to leave.
West Deniliquin residents are also being told to prepare to isolate as the Bureau of Meteorology predicts the river will exceed the major flood level on Monday or Tuesday, and may reach 9.6 metres later this week.
The SES Deniliquin unit said the community bagged 36 tonnes of sand in a day at just one site while preparing for rising floodwater.
'Volunteers overwhelmed'
A special recovery centre has opened in Eugowra as the town continues its clean-up after deadly flash flooding inundated most of the town.
Regional recovery coordinator for the Far West and Orana, Ken Harrison, said dozens of residents had signed up for emergency accommodation, as most of the houses wouldn't be habitable in the near future.
"As of the end of last week we had some 60 odd registrations and that will continue to climb, so I'd say we'd be talking in the hundreds by the time that's finished," he said.
Mr Harrison said the government had started organising caravan accommodation for residents and was also looking at options such as housing pods.
He said unsolicited donations of items such as second-hand clothes were one of the biggest "impediments" to the town's recovery with volunteers "getting overwhelmed".
"If people want to donate, Givit runs a process in which we can match needs to demands — and it's a far more efficient way of dealing with donations," he said.
Meanwhile, nine more recovery assistance centres are set to open across the state this week.
The multi-agency hubs will help flood-affected residents with tasks such as replacing damaged documents, physical clean-up efforts and mental health services.
The centres will be at Eugowra, Orange, Parkes, Kelvin, Gunnedah, Cudal, Wagga Wagga, Narrabri and Moree.
Strong winds cause damage
Damaging winds across New South Wales have blown the roof off an administration building at Dapto Public School, in the state's Illawarra.
SES and Fire and Rescue were called to the scene around midday, with students kept inside as the roof was secured.
There are no reported injuries.
The SES has received more than 600 calls for help in the past 24 hours, with around 200 from the Sydney metropolitan region, many for fallen trees.
A severe weather alert had also been issued in Victoria.
Strong winds hit on Sunday afternoon after a front battered attendees at two musical festivals at the weekend.
Victoria's SES received almost 500 calls for assistance during the 24 hours up to Monday morning, with millions of dollars worth of crop damage also reported.
