The NSW premier says the death of a five-year-old boy in floodwaters was "incredibly tragic" while urging people to heed warnings.
Dominic Perrottet said it was another tragedy brought on by the floods NSW had been experiencing for the last two years.
The boy was found dead on Saturday afternoon after a vehicle was swept away by floodwaters at Tullamore, northwest of Parkes in central western NSW.
The boy's parents were reportedly able to remove restraints from two younger children in the car, but weren't able to free the older boy.
"I extend on behalf of everybody across our state, our thoughts and prayers and hearts go out to the family," the premier said on Sunday.
Low and moderate rain is expected across NSW throughout the week but the Bureau of Meteorology warns this might not bring the respite needed.
"Because it is so saturated and all the river systems are at capacity, even a little bit of rainfall could impact or change the flooding conditions," senior meteorologist Miriam Bradbury said.
The flood impacts were likely to linger for weeks, if not months. There was a low threat of severe thunderstorms but if they did form, they would bring heavier rain.
Low to moderate rain was expected across inland NSW until Wednesday before the weather system is expected to move offshore, bringing moderate rainfalls across the state's coastline through to the weekend.
Two NSW towns are likely to be isolated for days as the flood emergency continues.
State Emergency Service workers performed six rescues and answered 112 calls for help between 6am on Saturday and 6am on Sunday.
The towns of Warren and Wee Waa, in the state's north, are cut off by road and expected to remain that way for days.
Emergency services are using aircraft to delivery water, medicine, food and other supplies to residents.
The town of Gunnedah continues to be impacted by major flooding as of Sunday morning, however water is slowly receding.
The Namoi River peaked at the major flood level of 8.24 metres on Saturday and SES workers were on the ground to assess the damage as it became clear.
Authorities have reinforced safety warnings in the wake of the five-year-old boy's death, renewing calls for people to take the dangers of floodwaters seriously.
SES spokesman Greg Nash saying a river or creek's conditions could change between morning and afternoon.
"We have some very resilient communities and some communities that are very much aware of their flood risk," Mr Nash said on Saturday.
"(However) we want people to drive to the conditions, and if you find a flooded or a damaged road as a result of flooding, to stop, turn around, (and) find another away - it's not worth the risk to push on."
There are concerns more inland catchments could spill over, with many dams already at capacity.
In the 11 days since the flooding began, emergency services fielded more than 820 requests for assistance in NSW, which included nearly 60 flood rescues.
© AAP 2022