The death of an 11-month-old boy on Wednesday is being treated as a tragic accident after his father is believed to have forgotten to drop him at his Helena Valley day care centre earlier that day.
Childcare workers tried frantically to revive the boy after his father found him still strapped in his child seat about 4pm on Wednesday.
It is understood the tragedy unfolded after the boy's father went to pick him up from the Ladybugs Early Learning and Care Centre and staff told him the boy had not arrived that day.
Police are still investigating the circumstances of the boy's death but do not believe there was any criminal intent.
They would not reveal how long the boy had been in the car.
A post-mortem examination will try to determine how he died.
Temperatures on the day reached about 25C and the interior of a parked car can be up to 30C higher.
Ladybugs general manager Kim Beange praised staff yesterday for their efforts to try to save the baby boy and their attitude towards work and the centre's children at such a trying time.
Mrs Beange said she could not comment on what procedures were in place if a child scheduled to attend did not show up.
She offered her condolences to the boy's parents and family and said she was proud of her staff.
"I'm very proud of the . . . professionalism that they've shown, as well as the caring for each other, the caring and support they've shown to the families and the other children at the service," she said.
"We know the girls are great and the jobs they do every day, it's not an easy job. They come in every day with the sole intention of caring for someone else's most precious part of their life and so I think we have to give them the credit. They've all still come back today even after what happened yesterday."
Staff and parents have been offered counselling.
Mrs Beange said the children had been shielded from the incident and their awareness of the death was "minimal".
Parents said they had been left trying to comprehend what had happened and the incident had not tainted their view of the centre.
Carlos Tzumquinonez said the incident was a timely reminder to parents as temperatures begin to rise.
"It's a very sad story, this heat . . . parents should always check the back seats," he said.