Heavy rainfall and 'cyclonic' winds are continuing to lash the Hunter region, after three people were killed at Dungog.

Three people are confirmed dead in the NSW Hunter Valley town of Dungog, after a strong east coast low wreaked havoc across the region overnight and into Tuesday.

NSW Police confirmed the deaths in a statement, saying, "During the morning a woman and two men were located deceased within the Dungog township. The circumstances surrounding their deaths are still to be determined. A brief will be prepared for the information of the Coroner."

Overnight Monday, winds gusting up to 135km/h, comparable to a category two cyclone, hit the region, bringing it with it torrential rain.

Similar conditions extended throughout Tuesday and into the evening.

A number of weather warnings are in place in the Hunter region, they include:

A severe weather warning for damaging surf and locally destructive winds, damaging winds, heavy rainfall and damaging surf.

A major flood warning for the Paterson and Williams Rivers.

A moderate to major flood warning for the Hunter River.

A minor flood warning for Lake Macquarie.

A sheep graziers warning for cold temperatures and rain.

A marine wind warning for storm force winds along the Hunter coasts.

The NSW Premier Mike Baird has passed on his condolences to the deceased Dungog resident's families.

He says getting power to hospitals and aged care facilities will be the priority.

Mr Baird says people should head home ASAP with the weather set to continue.

If you need assistance during an emergency, phone the NSW State Emergency Service on 132 500.

In life threatening situations, call 000 immediately.

Road information can be found at the Livetraffic website.

Tune in to 1233 ABC Newcastle on air or via streaming; or follow the station on social media.

Monitor the ABC Emergency website and social media.