The Emergency Alert test on October 4: what it will say and how to disable the sound.

FEMA and the FCC will be conducting the emergency alert system test that will sound off on your phones, TV and radio.

It's the second-ever national test of the Wireless Emergency Alert system intended for cell phones.

MILWAUKEE (CBS 58) -- An emergency alert was sent to phones around the nation Wednesday, Oct. 4. Thankfully, it was just a test. "Something's going on, but then I realized it was just my phone," said ...

On television and radio, the test is set to last about one minute, and will look and sound similar to monthly emergency alert system tests you may have heard before.

The Federal Emergency Management Agency and the Federal Communications Commission will conduct a nationwide test of the Emergency Alert System and Wireless Emergency Alerts on Oct. 4.

You can choose to opt out of certain emergency alerts from local authorities, but the upcoming test pertaining to the national wireless alert system will affect everyone with a mobile phone.

Multnomah County will test its emergency alert system Thursday at 2 p.m., sending notifications to up to 1 million phones. No action is required.

A wireless emergency alert test Thursday will reach cell phones across the Portland metro area. Officials ask residents not to call 911 in response.

An emergency alert drill has been scheduled for next weekend, set to trigger a 10-second siren to more than 88 million mobile ...