Another 6000 people in northern NSW are expected to become isolated over the next few days as floodwaters continue to flow downstream from southern Queensland.
Some of those people in Goodooga and Lightning Ridge could be cut off for weeks and the State Emergency Service (SES) is urging them to prepare for the worst.
SES spokesman Dave Owens says resupplying residents who are already stranded is also a priority.
'Our role has been to watch the levels of the water as they start to move down into the state and then down through the state,' Mr Owens said.
'A lot of it will be the water from Queensland but the water saddling around Moree and Wee Waa - that's also feeding into the river systems in NSW.'
Goodooga with 250 people and Lightning Ridge with 4000 people are expected to be isolated in the next few days by the floodwaters coming down from Queensland and Moree.
'Lightning Ridge could be isolated for up to two weeks and that would be predominantly from the Queensland floodwater,' Mr Owens said.
'Goodooga will be isolated probably tomorrow ... for up to eight weeks.'
Mr Owens said together with several other towns there could be more than 6000 further isolations.
'The weather forecast is still indicating that there's going to be a likelihood of storms within inland and coastal NSW,' he said.
'Of course those storms can bring with them quite heavy localised rain.
'We've got 27 aircraft across the state - our major focus is on resupply.'
About 5000 people continue to be isolated in the northwest of the state including Mungindi, Collarenebri and Wee Waa.
There are also flood watch alerts for parts of southern NSW including Bega, Molonglo and Queanbeyan.
