This event has made me re-think 3 days of food/water on hand. A weeks worth
(including pet food) is a better choice, and provisions to go longer (water filters,etc.)
Yeah, at least a week is a good idea. While I sometimes don't practice what I preach I do try to keep a decent stock of canned stuff on hand. And I am pretty good about keeping drinking water stored. In SD the main issue I normally face is winter storms.