Re: Self inflicted
On my Android phone I go to "Settings" then "Notifications" and "Wireless Emergency Alerts".
Under that I have the following options:
Allow alerts
AMBER alerts (child abduction emergency)
Extreme threats (life and property).
Severe threats (life and property)
Public Safety messages
Required monthly test
Then preferences to vibrate on receipt, speak out the alert and opt out on receipt of a first message.
I doubt that some of these are rarely if ever used in the UK. I didn't get the message mentioned in the article but I can see how I might have done. All of mine are off by default.
I hope this clears up any confusion that the downvoters to ARGON's post may have had.