1) The first thing you need to do is pull over. Whether you’re on the freeway, highway, or busy street stay calm and pull over.
2) Pulling over quickly and shutting off the engine will allow it to start cooling. Do this quickly to avoid serious damage to the engine or it’s components. In the event you’re unable to pull over make sure you switch off the AC and cool by lowering your windows.
3) You can turn the heater all the way up to full, doing this will help cool the engine. Flip on your hazard lights. Pull over.
4) If you’ve got clouds of steam or smoke billowing out of your hood, wait until it’s stopped. If you feel the the hood is still very hot wait for it to cool down before opening it up.
5) You can shut the car off but leave the key in the "on" position. This will allow the fans to continue to cool the engine. Wait approximately 30 min before trying to touch the radiator cap or engine. To avoid serious burns
6) If you just can’t seem to get the engine to cool call for a tow truck. Don’t risk further damage to your vehicle by driving while the car is overheating.