However, Wagga-based Nationals MP Wes Fang said investigations were "not the focus" while bushfires are still burning and people are still being kept from returning home.

Dr McGirr said the NSW Government should support a royal commission if the proposal was approved by federal cabinet ministers.

"I think NSW should have its own inquiry, because i think there's a lot of local information that we need to capture that I think a federal inquiry might miss," he said.

"I also think there needs to be a fairly rapid inquiry as well because it won't be long until summer is with us again and a federal royal commission involving all the states could go on for some years."

Fires in the South West Slopes region have claimed houses and farms and former Wagga animal science student Samuel McPaul lost his life while fighting fires at Jingellic.

Mr Fang said "people on the ground" had told him that putting out the fires and starting disaster recovery efforts were their priorities.

"At the moment,we have still got active fire grounds. I met with the Southern NSW Recovery Coordinator [on Monday]," Mr Fang said.

"This talk of a royal commission isn't coming from people on the ground around here, it's from those city types who want to dictate to us what happens.

"At the moment, I don't think it's the focus. I think the focus is supporting our communities and rebuilding our industries.

"The apples at Batlow, the cherries, the forestry industry and tourism all need to be rebuilt at the moment and that is the focus of the state government."

Dr McGirr said a state bushfire investigation should look at the preventative measures as well as the impact of drought and climate change on fires such as the Dunns Road bushfire in the South West Slopes region.

"From what I have seen, the extent [of the fire] has been quite unexpected, and in some respects I think you could say we have had a drought, fuel load buildup and incredibly hot weather," he said.

"I do think climate is a factor and we are going to face this situation again and I would like to think we can find ways of preventing it from affecting us to the same degree.

"That might mean clearing, it might mean back burning, but whatever it is, in Talbingo, Tumbarumba, and in Batlow, we have had an extraordinary situation and on top of that we have had damage to our softwood plantations and I'd like to see if we have got the best system for protecting that investment."

NSW opposition leader Jodi McKay has called for a "NSW-led public inquiry into the unprecedented bushfires sweeping across the state".

"There's still a lot of confusion and anxiety in the community about whether NSW was ready for these fires," she said.

"People should feel confident that their state government has done absolutely everything it can to keep them and their communities safe."

Prime Minister Scott Morrison said on Sunday that he would be "taking a proposal through cabinet" for a royal commission for a "review of the response" to the nation's bushfires.

Mr Morrison said any royal commission "must be done in consultation with the states and territories".

"I think Australians have a reasonable expectation that any commission of inquiry, royal commission, would need to cover the full gambit of issues," he said.

Riverina MP and Deputy Prime Minister Michael McCormack has not revealed how he will vote on the royal commission proposal when it comes to cabinet.