Floods can be caused by other natural disasters, like hurricanes and tsunamis, but they are often a natural disaster themselves. When water overflows a river's banks, a storm surge crashes over a break wall, or prolonged heavy rains pound a city's streets, a flood may occur, and it may be deadly. In this volume, readers are introduced to the causes and effects of floods, as well as the science behind their occurrence. The language is written for struggling readers but the content has been constructed with older readers in mind. Fact boxes, links, and graphic organizers engage readers throughout.