I've noticed something similar going on where I live. The shelves on many of the grocery store aisles aren't fully stocked and haven't been for a while and there's a noticeable shortage of toilet paper, paper towels, napkins and tissues. I assume people are preparing for all situations. Bottled water, candy and canned soups are less plentiful. So far, I see ample amounts of coffee, tea, flour, cereal, canned tuna, pastas, rice and pet foods.
Some of this could be due to people stocking up but I assume part of it is also because there is such a backlog in shipping goods throughout the country.