My Hurricane Katrina scent was Live Jazz. Grabbed it because (1) it was hot as hell during that September, and LJ is a nice warm weather scent; and (2) I figured I'd be on the go a lot, and all that bouncing and bustling might cause the bottle to break. LJ is so cheap it wouldn't bother me as much as if I had a bottle of GIT or MI with me.
For Sandy? Hmmm...if I was evacuating I'd pick a cheapie, but if staying put I'd pick a calming scent . . . maybe Chergui.