Mark, thanks---that clarifies it a lot.

The first thing (perhaps already done-- you seem to have thought this out)would be to be sure all the utilities, power, water supply, sewer/septic systems will be safe to be in the house when they are flooded. Don't want electrical charge in the water. . .

I also assume that you can use a cellphone to reach a nearby tower to call for help (or let everyone know your OK.

Then it just is a waiting game for the water to go back into its banks. Classic "bugging in." Food, medications, potable water, a way to cook, heat and diversions to pass the time. Adjust supplies for the max time you think you will be trapped.