Dreaming that your home was washed away by the flood means that there may be quarrels between family members, which may be caused by things between parents. At this time, you should control your temper, don't be willful, and help communicate the feelings of your family.
Dreaming that the flood flooded the house means that in your subconscious, you feel overwhelmed by school, work, family or some relationship.
If you dream that houses are destroyed by floods and people panic, and you are very calm, you may have the situation under control. This dream shows that you are eager to take responsibility or feel that your leadership ability has not been recognized as it should be.