Why are emergency procedures important?

To put it simple you'll know what to do in case of an emergency.

For instance, schools are required to perform Fire and Tornado Drills. If there was a fire or tornado that threatens your school you'll want to know what to do. Schools have planned routes out of every single room in case of a fire, and a planned place to go in case of a tornado, these plans are usually posted at the door of your classroom.