Might not take a week; every store shelf would be stripped within a day, there is only about a 2 day supply of gasoline in the distribution chain at any given time.
Most people would run out of food in their homes within a week, for sure.
Chaos would occur within a very short period of time.
About 6 meals I figure, 48 to 60 hours after the LINK (ebt) cards stop working.
You just described South Florida after “Wilma” and numerous other storms! The majority of people in this country would not be prepared for any quick snapped emergency, lasting more than a day!