As previously mentioned, "help arrives" and "back to normal" are not the same thing, and are usually seperated by several days, or weeks or months, of very stressful times. It's best to be prepared to care for all your needs for as long as possible. The often mentioned "72 hour kit" is a joke in my opinion. You should have a minimum of a week, not just three days. After a major disaster, help realistically won't be there for at least a week. Our "72 hour kit", or BOB, gives us the necessities for a full month. We consider anything up to 90 days to be short term. Over 90 days is long term, and could, and probably will, extend to years after a major natural disaster, before "normal" returns. We have a "BOT", an old fully enclosed trailer with our gear in it for up to six months, if we have to evacuate. We try to avoid leaving, as it greatly reduces our capacity to carry what we need for extended periods of time. If we can stay home, we're good for a couple of years.
Prescription medicines are a concern for many, especially those with chronic health problems or the elderly, like us. That's why we get prescriptions at K-Mart or Walgreens, so se can go to any store in the US and get refills, and we also use on-line services. We feel comfortable with our setup. It has held up through floods in Missouri, tornados in Colorado and a HUGE wildfire here in Arizona. If things go bad for a long time, we just go on with our plan.