I have been to 2 events where the game was called off and I had to drive over 100 miles home.
We went to Pittsburgh for work a few years ago, and I almost bought tickets before we went, but finally decided that since they weren't selling out, I'd get them day of game. Good thing I waited. That was the week that hurricane Ivan blew through Pittsburgh and pretty much shut the city down. The flood water was all the way up the the gates at the park. I was really bummed, but glad I hadn't blown the cash.