That is why they have disclaimers with investment ads on TV.
You need an insurance pro to answer your question.
Flood maps are changing and they are causing changes in insurance, building and repairing.
(Please note: when you choose an answer as a Best Answer, or at least give a thumbs up, it helps those who answer questions here.)
Ask the building dept as to your concerns about the area and potential risks.
Better yet if you have a buyers broker, they should be earning their fee.