If your cellphone was on at 2:20 p.m. Eastern time you should have heard a loud noise and seen a message flash across your screen.

The Emergency Alert System Test will be sent to all televisions, radios and cell phones.

The Federal Emergency Management Agency (FEMA) and the Federal Communications Commission (FCC) are conducting a nationwide emergency alert system test this week.

The Federal Emergency Management Agency (FEMA) and the Federal Communications Commission (FCC) are conducting a nationwide emergency alert system test this week.