When there's an emergency, call 911! In this helpful book, readers learn all about how 911 works. They'll discover when it's appropriate to dial 911 and when it's not. They'll learn what happens on a 911 call, including what information the call-taker might need. Readers also learn about the community heroes who answer emergency calls and how they handle crises until help arrives. Combining vital safety information with civics, this book uses high-interest material, reader-friendly language, and colorful photographs to deliver essential information in an appealing way.