Los Angeles County has an emergency mass notification system used to contact County residents and businesses via recorded phone message, text message, or email  in the event of critical situations. The system, called Alert LA county, allows the County’s Emergency Operations Center to notify residents and businesses during emergencies providing necessary information, such as evacuations.

The system compiles 911 databases, contacting land-line telephone numbers whether listed or unlisted. If the call is picked up by an answering machine, the system will leave a recorded message. If the number dialed is busy or does not answer, the system will redial the umber in an attempt to deliver the message.

The Alert LA County system uses geo-mapping where each telephone number or e-mail address can only be associated with one street address in the system. Each telephone number and e-mail address will be contacted when the street address it is associated with is impacted by a disaster or emergency.

To receive notifications for cellular, Voice over IP numbers and e-mail addresses, residents and businesses can register here.