9News cameras have captured the heartbreaking moment a house burned to the ground in Hillville, on the NSW mid-north coast.

Reporter Gabrielle Boyle was at the scene with home owner Guy Douglas as fire took hold of the property.

"Three times they've tried to save your house mate, and all you can do is watch," Boyle said to Mr Douglas.

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9News was there as flames took hold. (9News)

"Twice they saved it, and the garage went down last night, and it was alright this morning, and now, I don't know…so yeah, I think it might be gone this time," he replied.

Mr Douglas watched with Boyle as the frame fell, and huge flames sent thick plums of smoke into the air.

He had been in the property for 30 years.

'Not much you can do about it, that's mother nature,' the home owner said. (9News)

A house in Hillville burns. (9News)

"Not much you can do about it, that's mother nature," Mr Douglas said.

"Got to start again.

"You just think, what are you going to do, try and rebuild it."

RFS Commissioner Shane Fitzsimmons said three properties have been lost in Hillville this afternoon, which is just inland from Diamond Beach and Rainbow Flat.

Those areas were badly hit over the weekend.

Already three homes have been lost in Hillville. (9News)

Multiple emergency warnings are in place across the state as fire crews scramble to control the blazes in worsening conditions.

A 'catastrophic' fire danger warning remains in place for the Greater Sydney, Greater Hunter, and Illawarra/Shoalhaven regions, with an extreme fire danger warning for the Southern and Central ranges, North Coast, New England, North Western, and Northern Slopes regions.