It shuts things down here when it hits areas that haven't had snow for years; they no-longer have the infrastructure in place to deal with it for exactly the same reason Atlanta doesn't - it doesn't make economic sense to have the equipment sat around most of the time doing nothing. Essex contracts out all of its gritting and clearing; they got caught on the hop one year but has since started pre-gritting when there's a possibility of snow or ice (now if they'd just fix all fucking pot holes).
Some people are just ridiculously risk averse though. When we had snow in the South East last year (uh, I think it was last year) I was living up in Cambridge and I still travelled down to the office in London by train; people who lived in London were staying home. HR sent a company wide warning because of that (i.e. "don't do that again").