NSW has suffered through its wettest November on record, with lingering rain driving renewed flooding.
Tumut, Bathurst and Narrabri are among the places to break November rainfall records, the Bureau of Meteorology says, in a month that has seen major flooding inundate towns such as Forbes and Gunnedah.
Orange copped the most rainfall, with 317mm falling over the month - three to four times the town's typical November amount.
Temperatures will begin to warm up in the next couple of days, edging closer to what the state typically expects in December, BOM manager Agata Imielska said.
"But as the clouds part and the sun shines and warms things up, the humidity will also pick up and with that risk of thunderstorms will also increase."
With the La Nina atmospheric phenomenon driving conditions, December is set to be soggy too, with more rain threatening already soaked catchments.
While flooding has eased at Gunnedah along the Namoi River, with locals now preparing to assess the damage, downstream in Narrabri and Wee Waa major flooding continues.
Bugilbone is also experiencing moderate flooding.
Authorities are also closely monitoring the Macquarie River as it heads through the central NSW town of Warren, where there is major flooding.
The swollen Lachlan River also continues to cause flooding, with the river reaching moderate levels at Forbes, Condobolin and Cottons Weir.
Major flooding is occurring in Jemalong.
A downpour in southeast Queensland and northern NSW on Tuesday is also concerning authorities.
Inglewood in southeast Queensland has experienced major flooding, with the flows expected to cause similar conditions in the border town of Texas from Wednesday afternoon.
Major flooding is already underway in Goondiwindi too, with renewed rises likely overnight into Thursday.
Next in line is Boggabilla, where major flooding is also expected on Thursday, while moderate flooding is likely at Ashford.
Disaster assistance from the federal and state governments was extended to another 18 local government areas on Wednesday.
"The assistance being announced today will help ensure councils and individuals impacted by this event have the support they need to get back on their feet," NSW Emergency Services Minister David Elliott said.
