The body of a woman who went missing in NSW floodwaters has been found.
Police say they have not formally established the identity of the woman, but believe it could be that of Diane Smith from the central western town of Eugowra, devastated by by roof-high flash-flooding in the early hours of Monday.
Ms Smith, 60, last spoke to a relative on the phone from her car on Monday morning.
Ljubisa "Les" Vugec, 85, last seen at his Eugowra home around the same time is still missing.
State Emergency Service chaplain Steve Hall said Eugowra was decimated in the disaster.
"Everything they hold dear has been swept away in a wall of water," he said.
Rescue helicopters, military personnel and international emergency crews remain working across NSW flood zones as people in the central-western town of Forbes brace for their second inundation in a fortnight.
The Bureau of Meteorology is warning the Lachlan River at Forbes could meet the historic June 1952 peak of 10.8 metres on Wednesday, while major flooding is expected to persist until the end of the week.
People in parts of the north-western town of Gunnedah and the central town of Gooloogong have been told to evacuate .
The Namoi River is predicted to peak near 8.2m early in the day.
In the 24 hours until Wednesday morning, the SES responded to 329 calls for help and performed 17 flood rescues.
Emergency Services Minister Steph Cooke said 122 flood warnings were in place and hundreds of homes had been destroyed.
SES Chief Superintendent Dallas Burns said floodwaters at Forbes were slowly rising with water spreading throughout the town.
Fourteen people were rescued in Forbes at around 8pm on Tuesday night after the Plainsman Motel was inundated.
A helicopter rescued an elderly couple, their daughter and two small dogs from a Forbes home that was threatened by rising waters about 10pm.
About 1000 people and up to 600 homes and businesses are affected by evacuation orders in the town.
Crews have been door-knocking and sandbagging after 120mm of rain fell in a matter of hours early on Monday, causing ferocious flash flooding and forcing Wyangala Dam to spill into the swollen Lachlan River.
Labor's water spokeswoman Rose Jackson said the government's broken promise to raise the dam wall had disappointing devastated communities.
"Wyangala Dam (raising)... is not funded in the budget," she said.
"It was announced prior to the last election as a drought resilience project yet here we are years later with no work done," she told reporters on Wednesday.
Labor's flood mitigation plan did not include raising the dam wall, as it would only give false hope, Ms Jackson said.
"It's really unfortunate that the NSW government has once again chosen to politicise water in this state and chosen to reignite dam wars when they have no intention in proceeding with this project."
Opposition Leader Chris Minns said Labor had a $200 million package to beef up evacuation routes and stop building on flood plains.
The torrential rain doubled the height of Mandagery Creek at Eugowra, east of Forbes, early on Monday, devastating the town of 800 people.
Eugowra residents have described two sudden and intense surges of water flowing through the town, washing away houses, knocking over structures and leaving destruction like a "war zone".
Kelly Chambers was celebrating her twin daughters' 23rd birthday on Sunday night in the house the family bought less than a year ago.
Hours later, they climbed out a window and waded through waist-deep water as a torrent tore through the village.
Ms Chambers, her husband, their three children and her parents eventually found a truck trailer to perch on for six hours before a fire truck delivered them to the evacuation centre at the showground.
"It's devastating. Anything that is a memory is gone," Ms Chambers told AAP.
