The federal government lists five types of emergency alerts: National (formerly labeled Presidential), Imminent Threat, Public Safety, America ... Emergency Alert system has been tested at ...

But after his inauguration on January 20, he could operate a little-used system to send his message to every cellphone in America. Follow Tech Insider: On Facebook More from Tech It's widely known ...

Despite upgrades to wireless alerts system, emergency warnings were often ineffective when most needed during the Los Angeles wildfires. Some were sent to too many people, some to too few.