Mining magnate Andrew Forrest on Thursday pledged $70 million, the biggest individual donation to date from big names in Australian entertainment, business and sport.

And while millions roll in from the rich and famous, smaller donors from around the world are collectively making the biggest impact to the fundraising drive.

Among the many fundraising initiatives, the Red Cross has received more than $30 million in donations, comedian Celeste Barber's campaign has raised over $40 million and the Victorian Bushfire Appeal has more than $15 million.

Prime Minister Scott Morrison praised the "tremendous" and "simply extraordinary" generosity of everyone who's contributed to the bushfire relief.

"It's important we work hard to best channel and coordinate that support into the areas of greatest need," he told reporters on Thursday.

"It is, I think, important to take advice from both the state and federal agencies about where you can best direct that support."

Local, state and federal governments are all involved in the bushfire recovery along with charities, emergency services and the defence force.

The prime minister said coordination was particularly important when it came to environmental relief.

"There are a lot of organisations that do a lot of fantastic work and we need to try and best align how they're all working together," Mr Morrison said.

"So my simple request to those who are expressing this amazing generosity is to, as far as possible, call it all in and let's get it aligned.

"Let's all work together on this - that's the key."

Andrew Colvin, who is leading the national bushfire recovery agency, said the last thing he wanted to do was stand in the way of donations.

He has promised to work with Mr Forrest and other donors to ensure their money and resources are tailored to bushfire-affected communities.

"Clearly we're working with these organisations, we're working with these very generous people who are giving time, money, effort, logistics and products," Mr Colvin said.

"We're trying to direct that where we think it is best going to be utilised."

Mr Forrest has promised $10 million to assemble a "volunteer army" of more than 1200 people to help rebuild burnt out towns.

He says the volunteers will be dispatched to authorities and communities across the country who ask for help.

Their travel and accommodation will be covered by the billionaire's Minderoo Foundation.

Another $10 million will be spent in communities in collaboration with charities such as the Australian Red Cross and Salvation Army.

The remaining $50 million will go towards developing a national blueprint for fire resilience.

The federal government has committed at least $2 billion towards the bushfire recovery and established the national agency to coordinate efforts on the ground.

The NSW and Victorian governments have set up similar agencies at a state level.

Mr Forrest founded the Fortescue Metals Group and has interests in cattle stations.

He is worth almost $13 billion and is consistently ranked among the richest Australians.

Australian Associated Press