Dreaming of rain flies coming into your house can symbolize feelings of intrusion or disruption in your life. Flies are often associated with decay or unpleasantness, while rain can represent cleansing or emotional release. This dream may suggest that you are experiencing unwanted thoughts, feelings, or situations that are invading your personal space or peace of mind.

Consider reflecting on areas in your life where you might feel overwhelmed or where negativity is seeping in. It could be helpful to identify and address these issues to restore a sense of calm and control in your environment. Additionally, think about any emotional "cleansing" you might need to do—perhaps there's something you need to let go of or process.

Overall, this dream encourages you to take action to protect your personal space and emotional well-being.