The heavy rains have abated, but rescue workers are now monitoring inland communities as large volumes of water move down the Namoi, Mehi and Gwydir Rivers.
In an , the SES said clear weather conditions were expected for the next few days, but flood warnings remained in place for the Macleay, Severn, Macintyre, Gwydir, Mehi, Namoi and Peel Rivers.
The floods have already , who police say drowned when he was pulled into a storm water drain on Saturday afternoon in Bingara, near Inverell.
New South Wales State Emergency Service volunteers are stocking up Wee Waa with food and emergency supplies, with predictions the swollen Namoi River will isolate the town by this evening before peaking on Tuesday.
Already the rising waters have made the roads in Wee Waa inaccessible to all but four-wheel drive vehicles.
Phil Campbell from the SES says it is expected to be cut off for five to seven days as water levels exceed 6.7 metres around 9:00am (AEDT) today, before reaching 7 metres on Tuesday with major flooding.
"Life in Wee Waa will go on pretty much as normal," he said."The SES will be closely monitoring the situation in case there is the need for any medical evacuations. The expectation is that the town of 1,800 will become isolated from later today, and that isolation could last five to seven days. Read More