If you are moving into or have already moved into a house with flooding in the basement certain steps and precautions must be taken.  Check for mold and make sure there is no water damage.  Mold is a significant concern because it can not only damage your home and possessions, but cause dangerous health problems as well.  The most practical way to avoid mold is to reduce moisture in your home as much as possible.  If you find mold or water damage you should contact your insurance broker who will ask questions, such as how the water damage occurred, and determine if it is covered by your policy.  You should hire a contractor and have the work inspected.  A good inspector will tell you if there were any damages prior to a flooding incident.  Your insurance company will typically not cover any damages prior to the event.