The Federal Emergency Management Agency (FEMA), in coordination with the Federal Communications Commission (FCC), will conduct a national test of the Integrated Public Alert and Warning System (IPAWS) on Wednesday, Oct. 4, at approximately 1:20pm.

This is a standard test that occurs at least once every three years. No action is needed.

The national test, which will send an emergency alert test message to all cellphones, televisions, and radios across the United States, will help ensure that Wireless Emergency Alerts (WEA) and the Emergency Alert System (EAS) continue to be effective ways to warn the public about emergencies, particularly those on the national level.

The test will be accompanied by a unique tone and vibration on cellphones. The test message will read: “This is a test of the National Wireless Emergency Alert System. No action is needed.”

TV and radio broadcasters will also be required to deliver the test messages along with a similar audio alert tone to the ones they use in their monthly tests.

FEMA lists a backup testing date of Wednesday, October 11.