A 27-year-old mother has been charged with murder after two toddlers were found dead in a car south of Brisbane.

The mother of two toddlers who died after being left in a burning hot car south of Brisbane has been charged with their murders.

The 27-year-old woman will face Brisbane Magistrates court on Monday charged over the deaths of the one-year-old and two-year-old girls at Waterford West in Logan.

Authorities have said the sisters died from exposure to extreme heat, with the temperature reaching 31C when they were discovered.

The mother Kerri-Ann Conley will appear in the Brisbane Magistrates Court on Monday.

Police remain at the home and are putting together a timeline to establish how long they had been in a black station wagon parked across the property’s front yard.

Paramedics were called there about 1.35pm on Saturday but were unable to revive the little girls.

“The two children exhibited signs of being exposed to extreme heat and that is forming the direction of our investigation,” Detective Inspector Mark White said on Saturday.

“It’s a very tragic incident which has occurred.” Police said they were offering support to officers who attended the scene. “We are putting a lot of emphasis on supporting our people,” Detective Inspector White said.

“One of our priorities in addition to conducting the investigation is the wellbeing of our staff and our other emergency service colleagues.”

Police and paramedics were called to the horrific discovery at the Logan Reserve Road residence but were unable to revive the girls.

They were declared deceased and a crime scene was established as officers worked to determine the cause of the deaths.

Queensland Police took the parents in for questioning and just after midnight announced that a woman had been charged with two counts of murder.

It’s understood the woman is the mother of the girls.

Nine News reported the girls’ mother had tried to rush the toddlers inside to cool their bodies.

It was claimed she desperately tried to splash water on them after finding them.

Neighbours also told the Sunday Mail they believed the girls had been in the car about 6.30am, seven hours before they died.

Queensland Police are urging members of the public who may have any information regarding the matter to contact them.

Multiple media outlets have reported the car was “hot” at the time of the horrific discovery.

A neighbour near the scene told The Courier Mail they saw two lifeless girls being carried out of their home by police.

“My granddaughters saw the babies being carried out of the house soaking wet,” she said.

“It is a tragic accident, she was a good mum.”

Detective Inspector Mark White from the Logan Child Protection and Investigation Unit told reporters earlier on Saturday that the two children showed evidence of “being exposed to extreme heat”.

“At approximately 1.40pm this afternoon QAS attended an address at Waterford West,” Det. Insp White said.

“Two young children were located at that particular location.

“QA (Queensland Ambulance) made attempts to revive those children, unfortunately they were both declared deceased at the scene.”

Det. Insp. White said officers were speaking to the parents of the two toddlers.

“We’ll be speaking to quite a number of people to establish what was taken place,” he said.

“It is tragic. We are putting a lot of emphasis on supporting our people because it is a very difficult job. It is very very tragic and can be quite a distressing scene to be confronted by.”