Grocery stores, completely emptied out. Daughter manages a dollar store, they had to call police, just to get the truck unloaded. Walmart, and Meijers (regional store like Walmart), are both closing at night, just so they can restock the shelves.
They can still restock the shelves, which means the empty shelves are a function of panic and poor planning on peoples parts (much like a hurricane or blizzard cause empty shelves.)
Could that change in weeks/months to come sure, but that's not where we're at today.