Tornados, violent rotating columns of air that can uproot trees and peel off roofs, have been reported in every state, but they are more common in the midwestern plains states.
How to stay safe: If you hear tornado sirens or a tornado warning has been issued for your area, it means a tornado has been detected and there's immediate danger. Take shelter immediately in a basement or a small interior room away from windows—a closet, a bathroom, a hallway. Get under a sturdy table or a mattress if you can. "If you're in bed, pull pillows or a bedspread—anything—over the top of you," says Judge.
If you're in a car, get to a sturdy building if possible. If this is not possible, you have two options. One is stay in the car, buckle the seat belt, cover your head with your hands or a blanket, and duck below the windows. The second option, if there is a ditch nearby, is to get out of the car and lie down in the ditch and cover your head. You'll have to base your decision on your particular circumstances.
No matter what: Don’t get on an elevator. You could be trapped if the power goes out. If you're on a high floor, take the stairs.