Bay Area radio and television stations will join others across the country Wednesday for the first nationwide test of the Emergency Alert System. For decades, the stations have aired localized alerts - those familiar beeps and then the "this is a test" message. But this is the first time it will be done on a nationwide scale.
The goal is to determine whether the system would be effective in reaching the entire country in case of a substantial disaster.
The Federal Emergency Management Agency began preparing for the nationwide alert with a statewide test in Alaska last year. Alaska was selected because, much like the entire country, it has both tiny towns of a few dozen residents and large urban centers, officials said.
A follow-up test there in January corrected several problems with how...