(2) Water may be a feminine symbol, and the threatening flood may be your mother or your attachment to mother, who / which may be hampering your individual development.
See also Mother.
(3) Flood-water is destructive but also fertilizes and makes new growth possible. (Myths of a flood are universal; and they always represent a purging that prepares the way for something better.) The flood in your dream, therefore, may signify both a need for personal reconstruction and that the only way your new and true self can come into existence is through the ‘death’ of the old self - or, rather, of those things (negative attitudes, lopsidedness or whatever) that have been hindering the unfolding of your true self. Flood-water may be compared with the waters of baptism.
See also Baptism, and Introduction, page 44.