Wind is the common element no one plans for; elsewise they would scrap depending always/only upon popups and tents.
I was at a conference in Sacramento in 2005 (the first of only two "annual" "national" conferences held here/there) at which everyone and their neighbors brought their mobile command post, plus a couple helicopters and a pumper or three.
We had a freak windstorm blow up, sustained at a little lover 20 mph and gusting over 45 mph. All the helos left very closely followed by the trucks. Soon the shiney new mobile command post were packing it up. (At the end of the day, only the "Noah's Wish" animal organzation was still in place, God love 'em). If a little wind causes you to pick up your ball and glove and go home, what kind of emergency response org are you?