Fairfield police are warning parents about the dangers of hot cars in the wake of a child's death Tuesday on Long Island.

They say incidents like Tuesday's are what inspired the "Heat Kills" signs they have posted around town since 2015.

Officials say the 11-year-old girl on Long Island died shortly after being found unresponsive in a car parked in her family's driveway.

With temperatures over 90 degrees Wednesday, News 12's Sean McCabe got into a hot car while it was sitting in a parking lot. About 20 minutes after closing the door, the temperature reading topped 120 degrees.

Pediatricians say those conditions are dangerous for children.

Dr. Lauren Allison says heat exhaustion and heat stroke can set in quickly for children - no matter what precautions you take.

"Cracking a window, in the shade, I've heard many reasons why it might be OK, and none of them are going to be enough. We really just shouldn't leave our kids unattended in the car, for many reasons. Heat is one of them," says Allison.