4 October brings a nationwide emergency alert test to your phone

Beware. The federal government will test the emergency alert system countrywide on Wednesday afternoon.

All cellphones, TVs, and radios will get test messages. Phones will vibrate and make sound during the test.In preparation for emergencies, the FEMA and FCC are testing. 

The test ensures the emergency message system works in the event of natural catastrophes, terrorism, or other public safety threats.

The National Weather Service and AMBER alerts' jolting sounds may be familiar. Wednesday's cellphone warnings will use the same wireless method.

The test starts at 2:20 p.m. ET on Wednesday, Oct. 4.The testing session lasts 30 minutes, however you should only receive the notification once. Emergency situations may

delay the test, however a backup test is prepared for the following week.National Wireless Emergency Alert System test. No action required." Spanish-language phones display

"ESTA ES UNA PRUEBA del Sistema Nacional de Alerta de Emergencia. No action needed.""From 14:20 to 14:50 ET, the Federal Emergency Management Agency will test the Emergency

Alert System nationally. Just a test. No citizen action is needed."The Integrated Public Alert & Warning System (IPAWS) must be tested nationally every three years by FEMA.