The Hunter is bracing for heavy rain, storms and possible flash flooding.
A severe weather warning has been issued with as much as 100mm to even 200mm expected in some areas by tomorrow.
There's an initial flood watch in place across Newcastle and the Lower Hunter, with the Paterson, Williams, Karuah and Lower Hunter Rivers and the Wollombi Brook for Wednesday.
SES spokesperson Stephen Hart says personnel are at the ready with flood rescue units also in place.
"There's about 650 volunteers on standby, we have resources from other parts of the state on standby as well."
There's sandbags available at the following locations:
Maitland Unit- Waterworks Rd, Rutherford, NSW
Dungog Unit- Clarence Town Rd, Dungog, NSW
Singleton Unit- 9-11 Queen st Singleton, NSW
Tomaree Unit- 55 A Sandy Point Rd, Corlette
Newcastle Unit - 75 Elizabeth Street, Newcastle NSW from 2pm till 5pm today
The SES has this advice during severe weather:
- Stay up to date with information. Listen to flood warnings and follow the advice on how to protect yourself, family and property - see below for ways to stay informed.
- Keep your pets close by, always know where they are.
- Clean up yards and secure moveable objects such as trampolines, BBQs and outdoor furniture.
- Check on your family, friends and neighbours and share this information.
Safety is your highest priority - Never drive, walk or play in flood waters.