A 21/2-year-old girl found dead in her parents' car Saturday apparently climbed in the parked vehicle by herself and was overcome by heat.

The car was parked in front of the girl's home in Washington. Washington County sheriff's office dispatchers said excessive heat in the car, which had all the windows rolled up, is believed to have caused the girl's death. The girl was in the care of her older brother at the time and was found in the car by her mother.The temperature Saturday reached 89 degrees in St. George.

The victim was pronounced dead at 5:20 p.m. Saturday at Dixie Medical Center. Her name had not been released as of Monday. No additional information about reports from medical examiners or other aspects of the investigation were available from the sheriff's department.