About the possibility of a snow storm the day they go in to deliver?
I know I am. We had one of the worst winters last year, and I'm not expecting this one to be any better.
ETA: I should mention that I am about 30-45 mins away from the hospital I'm giving birth at, but in the event of an emergency, there is an emergency room type hospital (its all they do there) about 5 mins down the road. I'm also planning on going on mat leave at the beginning of the month, so I don't have to worry about being at work when I go into labour.