As temperatures rise across Oklahoma, firefighters are warning people not to underestimate how quickly a parked car can become dangerous.
News 9 tested that warning by placing a thermometer inside a parked vehicle. In less than 30 minutes, the temperature inside reached 120 degrees.
Oklahoma City Fire Department Public Information Officer Scott Douglas says heat can build inside vehicles faster than many people realize.
"As soon as you shut those doors, even with the cracked window, the heat can increase inside these vehicles dramatically, just within a matter of minutes," said Douglas. "People do underestimate that."
Firefighters respond to more vehicle lockouts
Oklahoma City Fire says crews have responded to 28 lockouts this month and are reminding people to take extra precautions, especially when traveling with children or pets.
Douglas says even a quick trip inside a store can turn into a dangerous situation.
"A few minutes turns into five, ten or fifteen and it's just not worth the risk," said Douglas.
Firefighters recommend putting a purse, phone, or another item in the back seat as a reminder to check before walking away from the vehicle.
A simple experiment shows the impact of the sun
News 9 also tested how the sun affects different colors by placing crayons on the hood of a vehicle.
After about 20 minutes in the sun, the darker crayons softened more than the lighter colors, showing how different colors absorb heat differently.
Firefighters say wearing light-colored, loose-fitting clothing can help when spending time outside in extreme temperatures.
Heat can affect anyone
Firefighters say heat-related emergencies aren't only caused by strenuous activity. They recently responded to a person who became overheated while simply walking outside.
They recommend staying hydrated, taking breaks, and having someone nearby when working or spending extended time outdoors.
Douglas says if someone becomes dizzy, nauseous, or stops sweating, it could be a sign of a serious heat-related illness.
If you see a child or pet inside a hot vehicle, firefighters say don't hesitate to call 911. Crews have the tools to get inside quickly and help.