CAPE GIRARDEAU, MO (KFVS) - So how hot is it outside, exactly?
At 1:30 p.m., the temperature in Cape Girardeau was 91 degrees.
A reporter with Heartland News decided to do a test inside the news car.
With the car turned on with air conditioning, the temperature was 71 degrees.
After turning off the air conditioning and waiting 13 minutes, the temperature climbed 48 degrees to 119 degrees.
This seems to be the case all over Cape Girardeau.
Sam Blattel and his brother-in-law sat out at Arena park under a pavilion in the shade Sunday afternoon.
They are equipped with bottles of water and staying hydrated while talking.
Blattel says he stayed out for about an hour until they decided to call it quits.
"We got a little breeze going to it's not as bad as it could be. But it's very hot out here. And there is about a 20 degree difference between under the shade and out in the sun," says Blattel.
Cape Girardeau Fire Department advices people to not take this heat lightly.
They say it's best to just stay indoors in the air conditioning - but if you have to be outside, bring cold water with you and stay hydrated.
The fire department also advises if you leave to run errands, make sure you don't leave any children or anyone else including pets in the car.
Officials say the temperature could soon lead to overheating, or even worse - death.
On Sunday, Cape Girardeau Police officers got a report of some dogs left inside a car in the parking lot of Sam's Club.
When Heartland News arrived on scene, thankfully the dogs were out of the car and in some shade.
It is unclear at this moment how long the dogs were left in the car - but police say the dogs are okay.
Temperatures this week will remain in the 90s, with heat indexes in triple digits.
Blattel says it's not safe out here for a long time and if you don't have to be out in it, just don't.