Rest rooms in the middle of building can offer some shelter from flying debris. Do not board or stay on school buses in a tornado warning . School buildings offer more protection and safety. As a last resort, seek shelter in a culvert or ditch. Protect your body from flying debris.
Upper stories are unsafe.
Stay away from large open rooms and windows. Never seek shelter in cars in the parking lot. Buildings with large free-span roofs are very vulnerable to tornadic winds. Occupants should leave these areas and move to smaller interior rooms, basements or designated storm shelters. If there is no time, lie flat in the nearest depression, such as a ditch or culvert and protect your head with your arms.