A Presidential Alert is a special class of alert that is issued by the President of the United States or the Administrator of the Federal Emergency Management Agency (FEMA) during a national emergency. It is one of three types of alerts that can be issued through the Wireless Emergency Alerts (WEA) system, which is a public safety system that allows authorized federal, state, local, tribal, and territorial public alerting authorities to send short emergency messages to mobile devices. The Presidential Alert is designed to let the White House inform the entire country almost instantly of grave public emergencies, such as a terrorist attack or an invasion.

It is important to note that the Presidential Alert is not something that can be opted out of, unlike other types of alerts such as weather and AMBER alerts. The alert is capable of accessing the E911 chip in mobile phones, which gives it full access to the phones location, microphone, camera, and every function of the phone. However, it is important to note that the Presidential Alert is only issued during a national emergency and is not something that is issued on a regular basis.