Water in dreams is consistently linked to emotion, and a flood specifically represents that emotion becoming too much to manage — rising faster than you can respond to it.
Water rising in your home
This is the most common version, and the home setting matters: it usually reflects emotional overwhelm bleeding into the areas of life that are supposed to feel safe and contained — your personal space, your family life, your sense of security.
Trying to stop the water
Dreams where you're bailing water, sandbagging, or trying to plug a leak often reflect active — if losing — attempts to manage an emotional situation that's outpacing your coping strategies.
Being swept away by floodwater
This more intense version tends to appear during periods when you feel like you've lost control of the emotional situation entirely rather than just struggling to keep up with it.