This title examines an important historic event—the powerful tornadoes that ripped through Oklahoma City, Oklahoma, and surrounding areas on May 20 and May 31, 2013. Easy-to-read, compelling text explores what happened when the tornadoes struck, how people took shelter, and how victims are rebuilding. Also discussed are the science behind tornadoes and how meteorologists predict and track them. Features include a table of contents, glossary, selected bibliography, Web sites, source notes, and an index, plus a timeline and essential facts. Aligned to Common Core Standards and correlated to state standards. Essential Library is an imprint of Abdo Publishing, a division of ABDO.