A donation page has raised more than NZ$95,000 for the family of Stephanie King.
Ms King, 43, and two of her children Ella-Jane, 11 and Jacob, 7, were swept away in flood waters in the New South Welsh town of Tumbulgumm in Australia on Monday.
A GoFundMe page, set up by the Club Managers' Association Australia, is urging the wider community to donate anything they can to go towards Ms King's widow Matt.
"All monies raised will be given directly to the family who have suffered the loss of their wife, mother and children so that they can pay for funerals, mortgage payments, bills and any loss of income as a result of their loss," the page reads.
Another of the Ms King's children, Chloe, 8, managed to escape the floods and ran to a nearby farm screaming for help.
The car the family were travelling in at the time was inundated with water after sliding off the road in bad weather.
A police spokesperson blamed the accident on the "slippery roads".
"She died trying to save her child," he said.
"Whilst the matter is going before a coroner, I've no doubt whatsoever that that woman is a hero, and she'd be alive today if she wasn't trying to save her children."
More than 1100 people have donated so far.