The premier is urging people in flood-affected areas across NSW to heed the advice of the State Emergency Service as some people take unnecessary risks by driving through floodwaters.
The Bureau of Meteorology says it will be drier across much of the state on Monday as rain eases, although there will still be some showers and storms in the north and flooding will continue across a number of catchments.
Rain will return across much of the state on Tuesday and Wednesday with major flooding still a concern along the rivers in the north west slopes, northern rivers and mid-north coast.
There is also a widespread risk of thunderstorms, particularly over northern NSW.
More than 400 SES workers remain on the ground across the state. They have performed more than 71 flood rescues since Thursday.
Premier Dominic Perrottet urged people in flood zones to follow advice and heed warnings.
“There are many challenges in relation to this facing our state at the moment,” he told reporters on Monday.
The SES had performed more than 30 flood rescues in the past 24 hours as people took risks by trying to drive through floodwaters.
“That is way too many,” he said.
“They are putting their lives at risk to protect you and your families.”
In the central west, the Namoi and Lachlan rivers are posing the biggest risk, with the SES dropping emergency supplies by helicopter to people who are isolated.
There is a minor to major flood warning for the Namoi River at Gunnedah, Boggabri, Narrabri, Wee Waa, Bugilbone and Goangra.
The Namoi River broke its banks at Gunnedah when it peaked at 8.61 metres on Sunday morning, with major flooding and reports of inundation in some homes in the flood plain.
Floodwaters are slowly receding in Gunnedah but levels are rising downstream at Narrabri.
Flood warnings are current for several other NSW rivers, but flooding is no longer expected in the Hawkesbury-Nepean Valley.
There is minor flooding at along the Hunter River at Maitland, with similar conditions possible at Raymond Terrace with the high tide from Monday evening.
The floodwaters at Singleton have now fallen below the minor flood level.
Minor flooding continues along the Gwydir River at Pallamallawa, while moderate flooding is underway downstream at Yarraman.
The Severn River at Ashford in the Northern Tablelands peaked on Sunday with moderate flooding, and minor flooding is occurring at Yetman.
The Castlereagh River at Coonamble peaked with moderate flooding on Sunday, but rises will occur downstream of the town for the next few days.
The flood peak is approaching Warren Town along the Macquarie River in the central west, where moderate flooding is expected.
Further rises are expected, with major flooding likely on Monday.
The forecast rainfall on Tuesday and Wednesday may cause further river rises in several catchments.