I agree with Diane - a Realtor will know some of the areas that most likely would be affected, but I have been dealing with clients and or potential sellers that have not had water in their basementssince they owned the home. That has been 25-30 years in a lot of cases. That being said, there are things you can do to help relieve the pressure that water puts on the foundation of the home. Also, if the homes have received water during that one storm, it has to be disclosed, as Diane mentioned. Hope this helps.
Enjoy the day!
Ovations and Encores, LLC
The Standard in Real Estate Performance