Raging bushfire traps residents in their homes on the outskirts of Sydney

  • Raging bushfire traps residents in their homes on the outskirts of Sydney

Raging bushfire traps residents in their homes on the outskirts of Sydney

Firefighters have worked overnight backburning around Voyager Point and Holsworthy.

The flames briefly shut a section of the T8 train line, while several roads remain closed.

"We believe it might have been a deliberately lit fire", Inspector Mitch Newtown said on Saturday night.

Over 500 firefighters responded on Sunday to a massive bushfire posing a serious threat to two residential neighbourhoods in Australia's most populated city of Sydney as the authorities declared a state of emergency.

Strong winds fuelled the blaze and burnt all weekend pushing residents and firefighters to their limits.

According to a Fire and Rescue NSW official Twitter account statement: "Moorebank Avenue, #Holsworthy Fire: Due to easing (wind) conditions the fire has been downgraded to Watch & Act".

A strike force has been established to investigate the blaze which is believed to have started in Casula.

"It's very unseasonal - the fire conditions we've been seeing - and obviously if that becomes the norm then we have to review the period of time that we have them", he said.

Conditions are expected to aid the firefighting effort on Monday, with winds about half the strength they were on Sunday.

"They've been assisting the firefighters on the ground in that Heathcote Road area who will be doing what they can as the evening progresses to bring that fire under control".

Local resident Jordan Dodin climbs onto a roof to protect the house from fire in Wattle Grove on Saturday night.

Greg Allan from the NSW RFS said that was where resources were being focussed.

But high temperatures remain a cause for concern, Rural Fire Service Deputy Commissioner Rob Rogers warned.

"Still quite a hard day ahead (on Monday)", he told the Nine Network.

The fire continues to burn in an easterly direction towards Barden Ridge, but the threat has been reduced.

"I think it's fair to say that it is highly suspicious, in the absence of any other cause like lightning", he said.

The blaze was downgraded from emergency level to watch and act about 5.30pm on Sunday as conditions began to ease.