Because I had this dream before, Duke Zhou said it was auspicious, and then something really happened. I looked up some information.
Dreaming of a flood-asking for money.
Dream of a rare flood-will be countered by the enemy.
Married women dream of floods-suffering from uterine diseases.
Old men dream of floods-they will die peacefully.
An unmarried girl dreams of a flood-her parents will allow her to marry her sweetheart.