How do I cancel the incident alarm

Twice my Forerunner 55 incident alarm went off.  Once because of a minor mountain bike crash and the other for no apparent reason.  Both times my wife received a text.  I sent her text saying I'm fine.  I would rather cancel it before it sends the text. 

Yesterday I was zonked prior to the alarm and my heart rate was as high as 165bpm. I regularly get over 150bpm on rides easily. Also it was very hot upper 90s and high humidity. 

Interesting after the alarm went off,  for no reason.  Because I was zonked I had a small crash and the alarm didn't go off.  Do I need to reset it after the alarm has been activated? I think both times it went off the recording process stopped.