If the event of doom as started and you have time here are a few last minute items to go and grab.
You should keep a stash of grab and go cash just for this event.
Last Minute Extras
Cases of water
Fresh Bread(Get stuff that will last the longest)
Fill up your gas tank
Extra gas in Portable containers
Extra OTC Medications
All the oats, rice and beans you can find
Jelly and jams
Fresh Fruit and Vegetables
Batteries as many as you can afford
Bags of ice (you will need to have a few ice chest)\
Cans of beans and veggies
Matches and Bic Lighters
Ammo, ammo, ammo and more ammo if you can get it, buy all of it!!!!!!
I keep a few hundred dollars set to the side just for this event and if I don't get to use it, so what but I bet I could find someone to buy a few extra items from.