Virginia police are investigating the death of a 2-year-old girl in another case where a child has died after being left in a hot vehicle.

Officers and emergency responders arrived at a residence in Roanoke Sunday afternoon responding to a call about an unresponsive girl, The Roanoke Times reported. The girl was pronounced dead at the scene.

The 2-year-old was left inside a van parked in the driveway of the Kenwood Boulevard Southeast home for an extended period of time, according to a preliminary investigation.

According to the National Weather Service, the temperature in Roanoke reached a high of 90 degrees on Sunday afternoon, the first day in August the temperature went that high in the city.

"At this state of the investigation, it appears that the child...was accidentally left in the closed van by a parent for an extended period of time," Roanoke police spokesman Scott Leamon said according to the newspaper.

Leamon did not say if the girl's death is heat related. The medical examiner is expected to perform an autopsy and the victim's identity will remain sealed due to her age, Leamon said.

So far no arrests have been made and the investigation is ongoing, Leamon said.

Since 1998, an average of 38 children have died each year after being left in hot cars, according to USA Today.

More than half of these deaths occurred because an adult forgot the child in the car. A Connecticut medical examiner recently ruled the July death of a 15-month-old as a homicide after he was left in a car for several hours.

Children are more at risk of heat stroke deaths because their bodies heat up faster than adults.

Temperatures inside cars can reach much higher than temperatures outside. For example, a car can reach 110 degrees even if the temperature outside is in the 60s, according to USA Today.