I live in Texas where we have a law about children being unattended in a car but even with this law we have had no less than 3 deaths due to this this summer alone. As you probally know the inside of a parked car can become very hot >150 degree in a short peroid of time. So with that being said I would probally yell for help we need a witness you know, very rapidly explaine what the situation is and then strike a side or rear window with a hard object(they break easer than the windshield) also call 911 for pd and an ambulance. Then get ready for the law suit from the abusive parants.