Emergency Alert System
Noun
Meaning
a federal warning system that is activated by FEMA; enables the President to take over the United States airwaves to warn the whole country of major catastrophic events
Source: WordNetSynonyms
Examples
AFSK is also used in the United States’ Emergency Alert System to transmit warning information.
The Emergency Alert System (EAS) and National Oceanic and Atmospheric Administration (NOAA) Weather Radio also provide emergency alerts.
KWVE-FM is also the primary Emergency Alert System station for the county.
The Emergency Alert System was never activated in the terrorist attacks, as the extensive media coverage made it unnecessary.