Natasha Gorjup died in the early hours of the morning on Sunday, five days after she was rushed to John Hunter Hospital in a critical condition when she was discovered inside a car parked in a Tanilba Bay driveway.

Teigan Campbell started the online fundraising page to collect donations to help the family cover funeral costs.

"This morning this beautiful little angel gained her wings, fly high baby girl foreva [sic] in our hearts," Ms Campbell wrote on the page on Sunday.

As of Tuesday afternoon, the page had raised $1800 of it its $2000 target.

Natasha reportedly got into the vehicle when she had been playing outside, without her parents' knowledge.

She was unresponsive when she was pulled from the car about 4.30pm on November 26.

Temperatures in the area reached the mid-30s on November 26, with Weatherzone observing an outside temperature of 27 degrees at Williamtown at 4.30pm.

Natasha was airlifted to the Newcastle hospital where she was put into intensive care.

Detectives had been investigating the circumstances surrounding the tragedy, but Australian Community Media understands no charges are expected to be laid over Natasha's death.

Police will prepare a report for the coroner.

Tributes have flowed from the community on social media since Sunday.

To donate, search "the Gorjup family" on the Go Fund Me website.