As I understand it, the entire NO sewage system was out of commission because of the storm. Nothing was going anywhere, even assuming they had some sort of bucket and deep enough standing water to scoop.
As for picking up their trash -- pick it up and put it where? Stack it in neat piles? Maybe there was a janitorial supply closet and they could have had one of the armed evacuees shoot off the lock?
As for picking up their trash -- pick it up and put it where?
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In the empty cardboard cartons that had MRE printed on the outside of them.