Reminder, Coming soon to a device near you: Emergency Alert System

The Emergency Alert System (EAS) is a national public warning system that requires radio and TV broadcasters, cable TV, wireless cable systems, satellite and wireline operators to provide the President with capability to address the American people within 10 minutes during a national emergency.

https://www.fema.gov/emergency-managers/practitioners/integrated-public-alert-warning-system/public/emergency-alert-system#:~:text=The%20Emergency%20Alert%20System%20(EAS,minutes%20during%20a%20national%20emergency.