AM is at the base of EAS because that was the dominant band going back to the times of CONELRAD. That's not the case now.AM radio is the basis of EAS. When SHTF..FM won't be there, nor will the internet.
Today, so little listening is to AM and most AM stations do not even cover their market fully that FM has to be the preferred information source on terrestrial radio. And many AMs have scaled back to low night power and limited coverage that it is useless in many markets.
Just looking at Florida, there is no full market AM day and night station in Ft Myers/Naples, Sarasota/Bradenton, Tallahassee, Pensacola, Oacala/Gainesville and none of the smaller markets.
