Commercial Mobile Alert System Law and Legal Definition

The Commercial Mobile Alert System (CMAS) is an alerting network designed to broadcast emergency alerts to mobile devices such as cell phones and pagers. The CMAS was adopted by the Federal Communications Commission in response to the Warning, Alert, and Response Network (WARN) Act of 2006. The system disseminates alerts received from the U.S. President, the National Weather Service (NWS) and emergency operations centers. The CMAS sends alerts to participating wireless providers who further distribute the alerts to their customers using text messages.