Cupid's Undie Run will happen rain or shine.  It's only a mile or so.  You can do it!  If there is a weather emergency, we will act accordingly (e.g. an epic snowstorm hit NYC a few days prior to the 2013 run, so we had to delay it by 1 week).  Keep an eye on the main page and on your city's page for alerts.  Alerts show up as a yellow bar located at the top of a city page and will also be announced via email and on your city's Facebook event page.