Fairfield police are warning the public of the dangers of hot cars, and leaving pets and kids inside of them.

There are more than 100 signs around town reminding residents to check their cars during the summer.

The "Heat Kills in Parked Vehicles" campaign has been in place since 2015.

"When your car is parked in the sun, it gets very hot very quickly, and the temperatures can exceed far beyond what the temperature outside is," Fairfield Police Capt. Robert Kalamaras says.

Kalamaras say most of the calls the department receives about hot cars usually involve pets being left inside.

However, at least nine children have died across the U.S., so far, this year after being left in a hot car.

Several car manufacturers have installed a rear seat alert in recent years to help prevent these types of tragedies.

Sen. Richard Blumenthal is pushing for the 'Hot Cars Act,' which would make the rear seat alert an industry-wide standard for auto manufacturers.

If the bill makes it out of committee, it would need approval from the U.S. Senate then House.