A veterinarian said a dog trapped in a car on a 90-degree day in eastern Pennsylvania honked the horn until he was rescued.
Nancy Soares said the chocolate Labrador was brought to her Macungie Animal Hospital last month after he had been in the car for about an hour.
She said Max's owner had gone shopping and was unloading packages when she returned but forgot that Max was still in the car. She later heard the horn honking and looked outside several times but saw nothing amiss. Finally, she went outside and saw Max sitting in the driver's seat, honking the horn.
Soares said the owner immediately gave Max cold water to drink and wet him down with towels before rushing him to the clinic.
Soares said Max was very warm and panting heavily but had suffered no serious injuries, only heat exhaustion.