From spiralling cyclones to huge hailstones, this is the perfect guide to nature's most destructive and dangerous forcesSee inside the eye of a cyclone, witness hailstones the size of tennis balls, and learn how a gentle mountain stream can become a raging surge within a few minutes. With striking images, models, and illustrations, this visual guide offers a unique view of catastrophic weather conditions. From polar regions to the tropics, Eyewitness Hurricane & Tornado shows the effects of nature's most extreme weather. Discover a bridge that collapsed due to severe gusts of wind, and learn about a tree species in southwest Africa that can survive several years of drought. Along the way you'll uncover historical items that reveal how ancient civilizations predicted the weather as well as the weather-forecasting techniques that have developed over the centuries and the ways in which human activity can cause weather patterns to change. Part of DK's best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seekers and stay-at-home explorers, with a fresh new look, new photographs, updated information, and a new "eyewitness feature - fascinating first-hand accounts from experts in the field.