CDC has much information. It's good for everyone to take a look at their site.
Something we see often in my area. Since it usually isn't this cold, not for long anyway, People have a mindset of "I'm just driving to town and back and I'll be fine with my jacket" People here don't wear hats or gloves. I keep a winter bag in my car. Extra stocking hats, gloves and a old wool army blanket as well as other items. Just in case your car breaks down. I usually have my own stuff, but what if you have someone who doesn't, or somehow they get wet or you loose your stuff. I have both a winter and summer bag. The vacuum bags are great and take little space and don't forget your BT snacks