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A 3-year-old boy died on Sunday in Dallas after he was accidentally left in a hot car parked outside a church as temperatures climbed into the 90s, according to police.

The child’s family was attending an afternoon bible study at Rehoboth Praise Assembly, according to television station KTVT in Dallas.

A church member told KDFW the boy’s parents were in separate groups at the church. When the couple reunited 45 minutes after arriving at the church, they realized they only had four kids and their youngest child was missing.

The father immediately left the church and ran to the parking lot, where he found the boy unresponsive inside the family’s SUV.

Paramedics performed CPR and rushed the boy to a hospital where he was pronounced dead.

The father speaks limited English and had trouble communicating that he needed someone to call 911, a church member told KDFW.

The toddler was the 21st child to die in a hot car this year in the U.S., according to the national safety advocacy organization

That figure is nearly twice as high as the number of children who died by this time last year, the organization reports.

A second child also died after being left in hot car last week.

On Friday, a 4-year-old girl died after she was left in a car in Williamsport, Pennsylvania, where the temperature rose to 97 degrees, CNN affiliate KNEP reported.

A woman who takes care of the girl usually dropped her at daycare in the mornings but on Friday the woman drove to work, the affiliate said, citing officials’ account. At the end of the woman’s workday around 3:30 p.m., she returned to her car and found the girl unconscious, police told KNEP.

Emergency responders tried to revive the child, who died at a hospital.