I'm on a FB page for the area I grew up and people are reminiscing about the regular testing (and malicious setting off) of warning sirens. I remember these from my childhood, they were like the air raid sirens of the 2nd world war but were intended as "the 4 minute warning" alarm of a nuclear attack during the cold war.
It was always quite chilling when you heard one during a test, even more so when some delinquent had broken in and set it off unexpectedly!
Did anyone else have these where they were?