There are about 110 rural properties currently isolated in the Garah, Gravesend, Biniguy, Pallamallawa, Croppa Creek, Gingham and the Big Leather areas.
According to the SES, these properties are expected to be isolated until Wednesday.
To the north of Moree, 20 properties at Garah are isolated and one low-lying property has been evacuated. The town is expected to remain isolated until Tuesday or Wednesday.
An evacuation warning was issued on Saturday for areas of Moree with 60 properties in town expected to be isolated as flood peak occurs. Residents of these properties have been asked to prepare for possible evacuation.
In rural areas downstream of Wee Waa 20 properties will be isolated from Monday for several days as flood peak moves through.
In the town of Ashford two properties have self-evacuated as a major flood peak occurred on Saturday night.
In the Gunnedah area there are 25 properties isolated at Talibah Flat. Residents of five properties affected by over-floor flooding have self-evacuated.
The NSW SES has four rotary wing aircraft and one fixed wing aircraft are operating in the areas for flood rescues, reconnaissance and resupply and Incident Management Teams have been deployed to the SES Namoi and North West Regions.
The Gwydir Highway is closed between: Moree and Gravesend; Moree and Narrabri; Moree and Collarenebri.
The Newell Highway is closed between Moree to the Queensland border.
The Oxley Highway is closed between Gunnedah and Tamworth.
The Carnarvon Highway is closed between Mungindi and Moree.
Many local roads across the area remain closed.