National Weather Service Tips
In case of severe weather, the National Weather Service provides these tips:
Do not use highway overpasses for shelter. Overpasses do not provide protection from tornadic winds. Vehicles stopped under bridges block traffic and prevent people from getting out of the storm’s path and to shelter. If you cannot drive away from the tornado…get out of your vehicle and lie flat in a ditch as a last resort. If you are caught outside, seek shelter in a nearby reinforced building. As a last resort, seek shelter in a culvert, ditch or low spot and cover your head with your hands. Do not use your car to try to outrun a tornado. Cars are easily tossed around by tornado winds. If you are caught in the path of a tornado, leave the car and go to a strong building. If no safe structure is nearby, seek shelter in a ditch or low spot and cover your head. If in mobile homes or vehicles, evacuate them and get inside a sturdy shelter. If no shelter is available, lie flat in the nearest ditch or other low spot and cover your head with your hands.