Yeah, if it wasn't the test day/time (Sundays @ Noon) and really nice weather you tended to take notice.

Twice I can remember there were errors in the CD/EBS system. The local broadcaster hit the Attack button instead of the "This Is A TEST" button. Half of the OKC viewing area thought TSHTF for real. The other time was a National Guard emergency mobilization drill. The genius at the state level sent the real (instead of test) code down the "phone tree". I made it from my house to the armory in record time. We actually were issuing weapons and NBC gear and waiting for the ammo to arrive before the snafu was caught.

Oddly, there was a retirement ceremony for the state AG less than a month latter.