First, do not panic. If safe to do so, pull over to the shoulder safely. If you are on a freeway or highway REMAIN in your car with your seatbelt on. Call for help whether it be friend or family, emergency services our Yarbrough Bros Towing. If you are in a safe location and can assess the situation, do so safely while always keeping your eyes towards oncoming traffic. If your car overheated, DO NOT attempt to open the radiator cap or overflow bottle top. The sealed system could be under pressure and release steam that is very dangerous and can harm you.