An 11-month-old girl died in Missouri after she was locked in a hot car for about 15 hours, according to police.

The baby was found Sunday at about 4:30 p.m., Calverton Park police officer Chris Robertson told ABC News.

The car had been left outside a home in Calverton Park, about 14 miles outside of St. Louis. The temperature climbed to 79 degrees in St. Louis that day.

No arrests have been made, Robertson said, however police spoke with two undisclosed persons of interest.

Police are working with the St. Louis County prosecutor's office as the ongoing investigation moves forward, he said.

Last month, a 2-year-old girl was taken to Kapiolani Medical Center for Women and Children in critical condition after she was left in a parked car for nearly two hours.

Her father told police that on May 5th the family went shopping and after he dropped them off at home, he went to work not realizing his daughter was asleep in the back seat. 

Hot car deaths reached a record level last year with at least 52 children killed, from California to Tennessee to Mississippi, according to national nonprofit KidsAndCars.org.

Click here for a list of hot car safety tips.