it is always best to have your insurance agent check for elevation and flood plain information.
Always have your Realtor get you the Seller's disclosure for the property you are interested in.
If I was purchasing a home close to Langham Creek which runs to the west of the Concord Bridge,
I would make sure I had flood insurance just in case even if it wasnt in the flood plain.
Finally, neighbors love to talk about their neighborhood, so if you are out looking on a Saturday afternoon while everyone is out doing yardwork and walking their dogs, they will tell you better than anyone the downlow on the neighborhood....
Just about any neighborhood can have drainage issues when there are sudden heavy downpours, esp during hurricanes. Some are just worse than others and you and your Realtor need to do your homework!