A nationwide test means the same text message will be sent to every cell phone in the U.S. later this week.

The Federal Communications Commission is conducting the nationwide test of the Wireless Emergency Alerts and Emergency Alert System on Wednesday, Oct. 4 starting at 2:20 p.m. ET (1:20 p.m. CT) and broadcasting for about 30 minutes.

The WEA portion of the test will send messages to cell phones. Displayed in either Spanish or English depending on the phone’s main menu settings, the English message will say “THIS IS A TEST of the National Wireless Emergency Alert System. No action is needed.”

Phones set in Spanish will display “ESTA ES UNA PRUEBA del Sistema Nacional de Alerta de Emergencia. No se necesita acción.”

All cell phones that are within the range of an active tower, and whose wireless provider participates in WEA, should be capable of receiving the text message. Texts for phones used by people with disabilities include a unique tone and vibration.

This is the third nationwide test of WEA, but the second test of all cellular devices, FEMA said. In a non-test situation, WEA alerts are used to send national emergency notifications from the president or FEMA, AMBER alerts about missing children and public safety messages about imminent threats or other safety recommendations.

The EAS portion of the test – the seventh nationwide trial – will be sent to radios and televisions. The EAS test will last one minute and will include broadcasts on radios and televisions, cable systems and satellite radio.

Test messages will be similar to the regular monthly EAS broadcasts and will say: “This is a nationwide test of the Emergency Alert System, issued by the Federal Emergency Management Agency, covering the United States from 14:20 to 14:50 hours ET. This is only a test. No action is required by the public.”

In the event of widespread severe weather or other significant event, the tests will be delayed until Oct. 11, FEMA said.