Four months is more than enough for some situations, just right for others and for what is hopefully a few, quite inadequate. So what specific scenario are we discussing?
There are a few reasons I can think of such as a long-term shutdown of the power grid, famine and economic collapse; any reason to leave the United States. That in of its self is not a problem for me. A problem I foresee is, for whatever the reason, there is a delay in leaving. The delay could be four months or more.
Jeanette Isabelle