02/10/2018
TOMORROW: At 11:18 AM PT tomorrow (October 3), FEMA and the FCC will test an emergency communications system and deliver an alert to mobile devices, TVs and radio stations across the United States and territories. Your mobile device will make a unique sound and vibration when it receives the alert. The emergency message will have a header that reads "Presidential Alert" and text that says: “THIS IS A TEST of the National Wireless Emergency Alert System. No action is needed.”
In a real-world event, this system can deliver life-saving info. This will only be a test and no action is required.
More info: https://www.fema.gov/emergency-alert-test