A 3-year-old boy died Monday in Veyo, Utah, after being left in a vehicle in the summer heat, authorities said.

The Washington County Sheriff's Office said deputies were called to the family's home around 6:10 p.m. after a 911 caller reported the child was unresponsive. First responders found the child unresponsive inside the vehicle. Despite efforts to save him, he was pronounced dead at the scene.

Investigators say the boy had been left in the car following a shopping trip with his family, though it is unclear how long he was unattended.

According to the nonprofit Kids and Car Safety, this marks at least the 28th hot car death involving a child in the U.S. this year. On average, 37 to 39 children die in hot cars nationwide each year.

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