https://www.fcc.gov/consumers/guides/wireless-emergency-alerts-wea
Wireless Emergency Alerts (WEA) | Federal Communications Commission
In passing the WARN Act, Congress allowed participating carriers to offer subscribers the capability to block all WEAs except those issued by the President.
Alerts from WEA cover only critical emergency situations. Consumers will receive only three types of alerts:
Alerts issued by the President
Alerts involving imminent threats to safety or life
Amber Alerts
Participating carriers may allow subscribers to block all but Presidential alerts.
What do consumers experience when they receive a WEA?
A WEA alert is accompanied by a unique attention signal and vibration.
WEA enables government officials to target emergency alerts to specific geographic areas lower Manhattan, for example through cell towers that broadcast the emergency alerts for reception by WEA-enabled mobile devices.
What could possibly be so all-fired important that the president demands we give him our involuntary attention?
Seriously, does he work for us or do we answer to him?