Deaths of children in hot cars prompt pleas

The deaths of four children in hot cars in recent days has brought the number across the United States this year to at least 23, nearly matching the total for all of last year and prompting experts to plead for vigilance and warn parents that it can happen to anyone.

"It just breaks your heart," said Janette Fennell, founder and president of KidsAndCars.org, a national child safety nonprofit based in Philadelphia. "We've done so much to try to get the word out and maybe that's why last year was down a bit but this year is not looking very good."

Four-year-old Samaria Motyka died on Friday in Williamsport, Pennsylvania after her caregiver drove to work instead of taking her to day care. In Dallas, 2-year-old Boi Lei Sang died after being left in a hot car in a parking lot Sunday while his family was in church.