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
"The activation of EAS meant that every radio and television station across the nation was instantly broadcasting the President's urgent message about the approaching hurricane."
plural of ea
"The pilot adjusted the throttle to maintain a steady EAS during the approach, ensuring the aircraft remained within safe speed limits despite the high altitude."
Initialism of equivalent airspeed.
Initialism of Emergency Alert System. In the USA, it receives alerts from NWS and other civil defense agencies.
"The phone chirped with an EAS alert warning about severe thunderstorms approaching our county."