Standard Emergency Warning Signal (SEWS)
What is SEWS?
It is a distinctive sound broadcast over radio or television.
When is it used?
The SEWS will be broadcast immediately before an urgent safety message. The signal will also be occasionally broadcast as a test message. Any test of the signal will be announced prior to and after the signal.
What do you do when you hear it?
Following the signal there will be a message, pay immediate
attention, listen to the announcement, and follow any instructions
given. As part of a coordinated national emergency plan, an audio
signal has been adopted to alert the community to an urgent safety
message relating to an identified emergency such as a flood, fire, or
What does SEWS sound like?
If you want to hear the Standard Emergency Warning Signal select the icon below.