How do weather forecasters predict storms? When does a snowstorm turn into a real blizzard? Get answers to these questions and more in the Natural Disasters series, which features clear explanations and tips for being prepared for extreme natural events. This photo-illustrated book describes tornados, or as they are known in other parts of the world, cyclones. Explains how tornados are formed, how they are predicted, what can be done to stay safe in areas prone to tornados.