ET theyll receive something a little different.
THIS IS A TEST of the National Wireless Emergency Alert System.
No action is needed, the alert should read.

A phone displays an emergency alert message sent on October 3, 2018 in New York City. The FEMA sent the “presidential alert” as a test to millions of phones across the U.S.Photo Illustration by Theo Wargo/Getty Images
This is only a test.
No action is required by the public.
Cell towers will broadcast the test for approximately 30 minutes, according to FEMA.

There have been recent issues with such alerts on the regional level.
There was no such threat.
The blaze that ripped through the town claimed an estimated 97 lives.
Should the Oct. 4 test be preempted by other significant events, the back-up date is Oct. 11.