Leaving your pet in a parked vehicle can be DEADLY! and it is AGAINST THE LAW! (To leave an animal under such conditions is cruel and punishable under California Law, Penal Code Section 597)
On a hot day, ten minutes could create serious health hazards for your pet if left in the car. Temperatures can soar to as high as 160 degrees inside parked vehicle. That's hot enough to cause a dog or cat to suffer a heat stroke, and within moments, sustain permanent brain damage.
IF EMERGENCY CARE IS NOT GIVEN, YOUR PET COULD DIE!
A brief stop at the store could stretch to 15 minutes before you know it. That mistake could cost your pet his life. Leaving the windows cracked will not cool the car enough to protect your pet.
Of course, your dog would love to go everywhere with you, but when the weather turns warm, it's best to park your pet at home.
If a pet is overcome with heat exhaustion, you can give immediate first aid by slowly immersing him or her in cold water until the body temperature has lowered.