Western Australia's premier has rejected calls for an independent inquiry into the deadly Yarloop bushfire to also include the recent Esperance bushfires, which killed four people.
Former head of the Victorian Country Fire Authority, Euan Ferguson, will have royal commission powers during his examination of the lightning-sparked bushfire that killed two elderly men, destroyed 181 properties and burnt more than 69,000 hectares.
But the Association of Volunteer Bush Fire Brigades, Emergency Services Volunteer Association, State Emergency Service Volunteer Association and WA Farmers are disappointed November's deadly bushfire in Esperance will not be included.
"We are also disappointed that the inquiry will not refer to the findings and substantial changes following the 1961 royal commission, which made the greatest difference to the safety of our communities in living memory," they said in a joint statement on Thursday.
"We all agree that the inquiry needs to be about building community resilience, safety, protecting lives and property from the ravages of bushfires."
Opposition leader Mark McGowan agreed, saying the Esperance community deserved the same treatment as Yarloop and Waroona.
He also gave his support for a parliamentary inquiry, adding that prescribed burns should also be examined.
But Premier Colin Barnett says a separate review of the Esperance fire is underway.
Some residents and volunteer firefighters have criticised how the Department of Fire and Emergency Services managed the Yarloop blaze, but Mr Barnett said there was a long history of disagreement between volunteer and career firefighters.
"The co-ordination between Parks and Wildlife, Fire and Emergency Services and the volunteers is probably the best it's ever been, but you do get a lot of people who have very strong views and I don't doubt or question their experiences," he told ABC radio.
"(But) when you have a fire of this enormity the local groups will struggle."
It took about seven minutes for about 90 per cent of Yarloop to be wiped out at night when water bombers could not operate.
Mr Barnett said conditions were so hot and windy that the fierce blaze "just ran away".
"I don't think anything could have realistically stopped that fire."
WA was getting more intense bushfires every year and could expect more catastrophic fires in the future due to more "chaotic weather", Mr Barnett added.
Mr McGowan said if the premier was concerned, he should not have abolished the climate change unit after winning the 2008 election.
Legal Aid WA is providing free information for those affected by the fires regarding insurance, property fencing, wills and estates, and replacing lost or destroyed documents.
More than $620,000 was raised for victims during WA Stands Together: The Nine News Bushfire Appeal on Wednesday night.
The money will go to the Lord Mayor's Distress Relief Fund, which has already raised more than $4.2 million.