(Fox 10) Phoenix Police say a 1 year-old pit-bull mix was left in the car for over an hour.
We're told even though temperatures may be cooler outdoors inside they increase at a higher rate.
When the temperature reaches 110 like it did Monday the temperature inside a car can be dangerous for pets.
Authorities questioned the owner of the dog after it was found dead this afternoon.
The owner left it inside the car for about an hour while running errands inside Christown Spectrum Mall in North Central Phoenix.
Police say a security guard spotted the dog inside the car around 3:30 p.m. and called 911.
The guard tried to move the dog to a golf car where they cooled it down with water, but it was too late.
An animal control truck was seen a short time later to recover the dog.
Ashleigh Goebel with the Arizona Humane Society says this is a sad reminder that this time of year it's never a good idea to leave a pet in a car.
"It just needs to be known out there that if it's too hot for you in your car, it's obviously way too hot for your pets," she said.
Phoenix Police have not arrested anyone but they are treating the case as one of animal cruelty.
"It's just really hot for animals this time of year and you can put them in scary, dangerous, situations if you're not careful," said Goebbels.
Police say the owner could face felony anuimal cruelty charges.