Valley first responders are advising people to stay alert with the rising temperatures.

The high temperatures can be dangerous and deadly, especially inside cars, as it is much hotter than the outside temperatures. 

Experts say it only takes 10 minutes for the temperature to go up nearly 20 degrees inside a car that is not running. 

Rene Perez, a registered nurse paramedic of South Texas Emergency Care, says they respond to a handful of heat-related emergencies involving cars each year.

"Unfortunately, we've seen patients that have passed away from heat exposure, from being locked up in a vehicle," Perez said. "And you know those are very traumatic events and very sad events."

Children can overheat four times faster than adults, which is why Perez says it is important for parents to always double check their car before walking away. 

Parent should know the warnings signs of heat-related illness, including a quick, strong pulse, dizziness, fainting or loss of conciousness.