A similar wireless emergency alert test message has been sent to all cell phones nationwide. "No action is needed". "Periodic testing is a way to access the operational readiness of the infrastructure and determine whether technological improvements are needed". Wednesday's one-minute test message will be received around 2:20 p.m. only by EAS participants, which include radio and television broadcasters, cable systems, satellite radio and television providers, and wireline video providers, officials said.
The national test will use the same special tone and vibration as with all WEA messages (i.e. Tornado Warning, AMBER Alert).
Because this is a Presidential Alert, cellphone users can not opt out of receiving Wednesday's test, per FEMA.
Wireless Emergency Alerts are sent to people's cell phones across the country during certain "critical situations", including risky weather events and times when there are missing children.
Tomorrow, at around 2:18PM Eastern (11:18AM Pacific), you'll get a text message flagged as a "Presidential Alert". Users can not opt out of receiving the WEA test.
Officials estimate that upwards of 225 million Americans will receive the test alert on WEA-compatible wireless devices.
A "Presidential Alert" sent to wireless phones and across the EAS would be issued in the event of an actual national emergency, such as a declaration of war or coordinated terrorist attacks, as determined by the president or the president's designee.
The test originally had been scheduled for September 20, but was postponed to Wednesday, its backup date, because of Hurrican Florence.
Aside from a few pertinent details about the alert (and the legalities supporting its existence), FEMA also released a mock-up image of what the message will look like on a smartphone. Some cell phones will receive the message; others will not.
Find out more on the FEMA website. Neither Trump nor any other USA president will be able to use the WEA system for any goal other than alerting citizens about a national emergency, according to FEMA.