You want to make metro areas of 6 million people prepared for things like this? Stop subsidizing the automobile. Stop making it so damned easy for us to build a society that’s so fragile, that’s so close to the breaking point, that the world ends and we have to sleep in our offices when we’re seven whole miles from home (as one tale had it). This isn’t solved by various Atlanta area regional governments providing more services, more salt and plow trucks, or even more transit facilities. This is solved by not subsidizing a lifestyle that makes it completely impossible to have any sort of resilience.