Stuck in your car for 24 hours

Situation:
It's summer ... very hot. People are cranky, making the drive home from work horrendous, and the highway filled with road-ragers  You come to a sudden stand-still, barely missing the car in front but having the car behind you crash into yours.  After talking with the person behind you, a little legwork shows there is a major traffic accident ahead of you. Traffic is stopped for miles.  Obviously, no one is going anywhere.  You realize you might be there a very long time, but the closest exit or town is miles and miles ahead. There are no cell towers where you're stopped.

Do you stay with your car? Try to walk it?

Assuming you are going to be there overnight ... what do you do for food, water, toilet-needs, and sleep?

No air conditioning in the summer heat

I am going to try something new.  Every once in a while, I'll post a "situation" that you have to think your way through, using preps or not. This is the first such post.

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Situation:
It's summer.  90+ degrees in the shade.  Everyone in your neighborhood is running their air conditioning and fans.  So much so, that it causes an electrical outage. Thus, you have no electricity and no running water. You haven't gotten around to prepping so there's not much in your fridge.  You can't, for any number of reasons, leave your home to eat at a restaurant, and don't want to order food to be delivered. 

You have five items in your fridge, plus condiments.  What are they?

You have two items in your cupboard. What are they?

You have only 1 gallon of drinkable (potable) water.

How do you use these things to prepare 3 meals for you and one other person?