Dreaming of your childhood home often symbolizes nostalgia, comfort, or unresolved issues from the past. The presence of water can represent emotions and the unconscious mind. Since your siblings are swimming in the water, it might indicate a shared connection with your family and emotions related to your upbringing.
The water filling your childhood home could suggest that emotions or memories from your past are currently affecting you. It may also signify a need to confront these feelings or to reconnect with your family dynamics.
Consider what aspects of your childhood or relationships with your siblings might be resurfacing in your life. Are there unresolved issues, or do you feel a desire to reconnect? Reflecting on these themes could provide clarity and help you navigate your current emotional landscape.