The month of July saw a record number of children across the U.S. who have died of heatstroke when left in hot cars. In 2017, 29 children died of heatstroke after being left in a vehicle. And 11 of those deaths were reported this past week alone.
On average, 37 children die each year after being left in a car.
"Even on an 80-degree day -- which is a mild summer day for most of the country -- you're at 109 in 20 minutes" inside a car, said Jan Null, a meteorologist at San Jose State University.
Sens. Richard Blumenthal and Al Franken introduced legislation requiring all new passenger vehicles to be equipped with a child safety alert system. The technology would alert drivers if a child is in the back seat once the car is turned off.