Authorities say two children were found dead in hot vehicles just hours apart in central Florida.

The Orlando Sentinel reports that both deaths occurred Friday afternoon in the Orlando area.

The Orange County Sheriff's Office says a passer-by spotted a 4-year-old boy alone in a locked car with the engine turned off in the parking lot of Elite Preparatory Academy. Firefighters rushed the boy to a nearby hospital, where he was pronounced dead.

About two hours later, the Seminole County Sheriff's Office says a 1-year-old girl was found dead inside a hot car at a Sanford gas station.

The child's mother, 29-year-old Kailyn Pollard, is facing a negligent manslaughter charge, according to an arrest report. The report states the girl was left in the car for seven hours after Pollard forgot to drop her off at daycare. 

Area temperatures were in the 90s on Friday. 

Information from WFTV contributed to this report.