The National Weather Service is pushing the slogan - Beat The Heat, Check The Backseat - to remind people never to leave children or pets in a vehicle unattended during the summer months.
New Orleans forecaster Ken Graham says 22 children nationwide have died this summer after being left in a hot vehicle.
"Most of the cases it's people just forgetting, just walking off, busy in life, going to the grocery store, going to run errands and they're forgetting their pets and their children are in the backseat," Graham said.
The Weather Service says from 1998 through 2012, 20 children in Louisiana and 12 in Mississippi died from heat stroke suffered while in a vehicle.
Children are more susceptible to heat stroke because their body temperatures warm at a rate three to five times faster than an adult, the Weather Service says.