The popular Australian comedian has rallied people from around the world to donate.

Celeste Barber is using her international fame as the down-to-earth Aussie who mocks celebrities on Instagram to raise much needed funds to help those affected by the bushfires.

The comedian has so far raised more than $2 million for The Trustee for NSW Rural Fire Service and Brigades Donations Fund.

She put up the online fundraiser on Friday, sharing a photo of her mother-in-law's lounge room in Eden on the south coast of NSW, with the outside a frightening dark orange colour.

"This is my mother in laws house. It's terrifying. They are scared. They need your help. International donations can be made via the link in my bio," she wrote.

Want to join the family? Sign up to our Kidspot newsletter for more stories like this.

The Instagram post that has helped raise more than a million. Photo: Celeste Barber/Instagram

She also posted her fundraiser on her Facebook page writing: "Want to join me in supporting a good cause?"

"I'm raising money for The Trustee for NSW Rural Fire Service & Brigades Donations Fund and your contribution will make an impact, whether you donate a lot or a little. Anything helps. Thank you for your support."

Her post at the time of writing had raised $2, 403,002 of a $2.5m goal, with 4.7K shares.

More than 2000 koalas are feared to have perished in the bushfires since September. Picture: AAP Image/Morgan SetteSource:News Corp Australia

Scary like California

Her posts moved thousands to comment and donate, expressing their worry for and solidarity with Australia.

"I lived in Canberra for 3 years. My heart is breaking for Australia. I currently live in California. We have been close to being evacuated due to bush fires. Praying for Australia," someone commented.

Thank you for using your social media to spread the word for us in Australia. #weareonfire #blackchristmas," said another.

"Awful! This reminds me of our horribly scary fire season in Southern California. Sending donation now!" shared another.

"Good on you for using your influence and platform to do a job our shit house government shouldn’t have placed into our hands in the first place. You’re a bloody legend," enthused another.

"Thank you for using your public profile to raise awareness for this horrific disaster and humanitarian crisis," another person said.

A state of emergency has been declared for both Victoria and NSW.Source:Supplied

Keeping people alive

The east coast of Australia is expected to endure a horror day as temperatures soar to 45C inland and 44C on the coast, and huge fire fronts continue to wreak havoc, destroying wildlife and homes.

RFS Deputy Commissioner Rob Rogers said on Friday that success on Saturday would simply be keeping people alive. “We will be very happy and call it a success if there are no lives lost.”

“This state of readiness for NSW can’t be matched anywhere.

“We are as ready as we can be.”

130 fires were burning across NSW on Friday night and 17 lives have already been lost.

The Salvation Army, the Red Cross and Vinnes all have bushfire disaster appeals.