Memory Safety SignsVersión en línea This will help you practice safety signs. por Julianne Linza People are keeping this community safe. This is a place where young adults who are in trouble could go. Hazardous, toxic materials like blood are in here. Do not pick this up! Keep matches, lighters, and cigarettes away! Firefighters and EMTs work here. Watch where you are walking. It could electrocute or shock you.