The pictures you see of those highways is exactly the way it was here when Rita hurricane was coming here. I was safe at my Conroe house and a few blocks away, people were stranded on interstate 45. Going north on that one was the worst and people died on that road, going west was bad but didn't get report of death on that one.
This is why hurricanes make you think of your preps and it was hurricanes that started me prepping. I know right now you are glad of what you have stored and you will think of other things you need to store by going through this emergency. Make a list of what you need that you don't have, and try to get those items for a next emergency.
On the list ... check!
Seriously though I was very happy with my emergency performance. I led the concern-curve by about 2 hours and that got me home before everyone started getting stuck. Hope i’m as good for the Big One.
As far as supplies, I can’t think of anything this event showed me that I don’t have. ... except maybe a three-wheel offroader vehicle....