CENS is the Community Emergency Notification System. The system is designed to rapidly notify an affected area of an emergency by sending a recorded message through the telephone system. CENS uses the 911 database to extract phone numbers determined by the circle or area drawn on the CENS map. CENS launches a prerecorded message to the telephone numbers in the area defined. See our brochures for more information: CENS - English Opens a New Window. CENS - Spanish Opens a New Window.