Cook says small rooms, such as closets or bathrooms, in the center of a home or building offer the greatest protection from flying debris. Such rooms are also less likely to experience roof collapse. Always stay away from windows and exterior doors. Tornado winds may produce a loud roar similar to that of a train or airplane. At night or during heavy rain, the only clue to a tornado's presence may be its roar.
Thunderstorms can also produce violent straight-line winds which produce a similar sound.
If any unusual roar is heard during threatening weather, take cover immediately. The key to survival is advanced planning. Have a tornado emergency plan at work and school and conduct drills. All members of a household should know where the safest areas of their home are. Identify interior bathrooms, closets, halls or basement shelter areas.