Summer hasn’t even arrived, and yet already this year seven children have died of heat stroke after being left in vehicles.

KidsAndCars.org reports the following deaths in a 16-day period in May:
A girl, 5 months, died May 10 in El Paso, Texas, after her mother, a high school teacher, unknowingly left her behind in her SUV.
A boy, 4, died May 15 in Transylvania County, N.C., after his grandmother forgot to drop him off at daycare.
A boy, 11 months, died May 16 in Miami, Fla., died after being left behind in his mother’s car.
A girl, 1, died May 17 in Dallas, Texas, after her mother, an elementary school teacher, unknowingly left her behind in her vehicle.
A boy, 1, died May 24 in Corpus Christi, Texas, after his uncle forgot to drop him off at daycare.
A boy, 18 months, and girl, 2 months died May 26 in Glen Allen, Va., when they were left in the car while the mother was at work.
All of the children were left by a family member, and all but one child were under age 2.

“The worst thing any parent or caregiver can do is think that this could never happen to them, that they are not capable of inadvertently leaving their child behind,” says Janette Fennell, founder and president of KidsAndCars.org, the leading national nonprofit child safety organization working to prevent injuries and deaths of children in and around motor vehicles.

“This can and does happen to the most loving, responsible and attentive parents.” Since the group began tracking data, more than 675 children have died in these preventable tragedies.