Go to the basement, if available, or an interior hall- way.
Upper floors are unsafe.
If there is no time to de- scend, go to a closet, a small room with strong walls, or an inside hallway. Do not remain inside a vehicle. As a last resort, and if no ditch or ravine is nearby, crawl under the vehi- cle. If in open country and time permits, locate suitable shelter. If not, lie in the nearest ditch or ravine.