In 1889, a downpour of rain caused the South Fork Dam to collapse. A huge wave of water rushed into Johnstown, killing thousands of people. This book examines the scope of the disaster, its causes, and how people can keep a similar disaster from happening again. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, infographics, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards. Core Library is an imprint of Abdo Publishing, a division of ABDO.