I was in New Jersey when hurricane Sandy hit. We did some major prep work before-hand to protect the house and did some shopping to sustain us through post-hurricane days. I have also been in an ice-storm in Montreal, Canada, where we were stuck at home for a whole week, so a little preparation would have come in very handy, but we still managed to make the most of the adverse condition.
In the recent heat wave in Melbourne, we ate a lot of watermelon to keep hydrated along with drinking water, so shopping in the early hours of every morning was a great advantage.