Tornadoes are so powerful they can bounce a twenty-ton truck up and down or rain down a pond full of frogs on a nearby town. Most are 400 to 500 feet wide, but they can be up to a mile wide! With clear, concise text and dramatic, full-color photographs, Seymour Simon investigates one of nature’s most powerful and dramatic phenomena, from its origins to what you can do to detect and stay safe during a tornado.