Prohibits intentionally leaving or confining pet animals in a vehicle under conditions that endanger their health, safety, or well-being. Allows law enforcement officers, animal control officers, and firefighters to enter an unattended vehicle to protect the health, safety, or well-being of a pet animal that is endangered by being left or confined in an unattended vehicle. Allows private citizens to rescue a pet animal that has been left in an unattended vehicle under certain circumstances.