Hot temperatures in the summer months are a concern for Cameron County District Attorney Luis Saenz.
He said he wants parents to know just how dangerous it can be to leave a child in a locked car.
Experts said on a hot summer day it can take as little as six minutes for a car to reach deadly temperatures.
It might feel like 94 degrees outside, but inside a locked car it's a blistering 145 degrees, according to Saenz.
"We lose children that have been left in cars and they die of heat exhaustion," said Saenz.'He said children under the age of four are at the greatest risk for heat-related illness. Their bodies can not regulate body heat as well as adults.
"If you see a child in a locked car, call 911 and if no one shows up in a matter of minutes break the car window an get him out of there and get him water and put them in the shade," he said.
This year alone, three children have died across the state. The district attorney doesn't want to see it happen in Cameron County.
Saenz told Action 4 News, "Every year in the last 3 to 4 years we've had at least one and thats one too many."
He said he'd like to see that trend come to an end as these fatalities are preventable.
"They think its not going to happen to them and they are just going to run in there and pay the light bill just going to run in to get a prescription they're just going to run in to do something that's going to take a few minutes, but thats all a child needs to parish under theses temperatures, " said Saenz.
It's why the district attorney's office is putting up billboards to remind the motoring public to never leave children inside a locked vehicle.
The billboards expect to go up on July 1 in Cameron Count