More than 1000 people requested help from the SES over the weekend as a deluge of rain left many stranded in floodwaters across the state.
Eleven suburbs remain under evacuation orders on Monday morning despite rainfall easing.
Minister Emergency Services for New South Wales Steph Cooke has warned residents in flood prone areas that the worst could be yet to come as many rivers are yet to peak.
“My message is, please don’t be deceived,” she said.
“The sun might be out in various parts of the state, we may be seeing some dry conditions at the present, but our rivers continue to rise and we know that there is another event coming through.
“We may see a reprieve for a few days but … [we] will be heading into some more difficult conditions towards the end of the week.”
NSW SES received 1008 calls for assistance and completed at least 44 flood rescues over the weekend.
Eight rivers are already in major flooding across NSW.
Downstream of Tamworth, Forbes and Dubbo could see major flooding in the coming days.
The Warragamba Dam is spilling out 90 gigalitres a day, increasing pressure on the Hawkesbury River which impacts thousands of residents living on flood plains.
It comes as Prime Minister Anthony Albanese told reporters the Federal Government has made themselves available to provide assistance at the request of the state government.
“My heart goes out to those people who have suffered time and time again,” Mr Albanese said.
The Bureau of Meteorology warned more residents would be urged to evacuate over coming days as 100km/h winds and heavy rainfall hit the state.
“We’re in for a long spring and summer in relation to wet weather conditions,” Ms Cooke said.
“Our dams are full to overflowing. Our rivers are full. They are at capacity. And our ground is saturated.
“We are asking on that basis for people to please stay informed.”
Just over the last 24-hour, wide spread totals of up to 50mm of rain were captured across western and central-western slopes.
Along the coast, another 50mm-70mm of rain fell, with some areas copping levels above 100mm.
NSW SES directed people in low-lying farmland in Agnes Banks near Richmond and Lower Portland east of the Hawkesbury River to evacuate before 5pm on Sunday.
An evacuation centre was opened at Castle Hill RSL. Residents of the Riverside Ski Park in Cattai were told to evacuate by Sunday 6pm due to dangerous flooding.
Residents of the Western Plains Tourist Park, in Dubbo and Gronos Point, northwest of Sydney were ordered to evacuate earlier on Sunday morning.
Bureau of Meteorology spokesman Jane Golding said that the state can expect a couple of days of relief for the start of the week, but more is due to come.
“We should see a couple of days of fine weather for the most part but flooding will remain for the next few days,” she said.
“Unfortunately, this is the time of the year we see a series of fronts move through New South Wales and there is another one expected to come into the west of the state on Wednesday.”
The Australian Defence Force was called in to help with rescues across New South Wales as the state braces for more wild weather and flooding.
A low pressure system located just off the NSW central coast will deepen as it moves eastwards further off the coast throughout Sunday.
BOM senior meteorologist Dean Narramore said while heavy rainfall will ease by Monday, the worst is yet to come. “Although the rain will ease up from (Sunday), the worst is not over I am afraid,” he said.
“NSW will get a few dry days before another weather system just as bad hits the coastal areas on Wednesday.
The NSW coastal town of Ulladulla has seen the biggest downpour in the last 24 hours with 110mm of rain with the Sydney metropolitan area receiving 40-60mm of rain.
“It is more worrisome because of the already severe flooding situation in NSW, any rain after this will simply add on to that severity,” Mr Narramore said.
While the heavy rainfall is expected to ease on Sunday, 80 flood warnings are still in place and a flood watch will remain in place for much of the state.