This is a free mass notification system for Los Angeles County residents and businesses. The Los Angeles County Sheriffâ€™s Department uses Alert LA County to contact the public during a Countywide emergency and in communities where the Sheriffâ€™s Department directly serves as the law enforcement agency. Alert LA County sends shelter-in-place instructions, evacuation, and other emergency messages. It has accessibility features for people with disabilities and others with access and functional needs. You can also select your preferred language.