Yay.

 So it is probably obvious but I want to make sure. How bad is the city? I assume the supermarkets are closed. Is there running water? Electricity? Internet? Cell phone service?  I just don’t want to run into a "so i had my character sitting in this abandoned office building smoking a Cuban when he got hungry and order a pizza with his smartphone that was embedded in his hand and was the size of a staple," when that would be totally unreasonable because "there are no working phones or any internet and even if your character could get someone to deliver a pizza it would cost him about three thousand dollars because of the scarcity of the ingredient and gas not to mention the fact that there are groups of people who have divided the city into warring zones and would run him off the road a hijack him anyway" That scenario also brings up another point. How many people are left in the city and what's the ruling structure like? Which probably depends on the answer to the question "how long exactly was it between the evacuation and the first post?"