The thing with dream interpretation is that the meaning grows as the details grow. Less is always less when you're interpretting dreams.

Tsunamis like this are a reflection of anticipation of some sort of turmoil. Similar to seeing a major storm (like hurricane or tornado) come in, but with its own twist of meaning. That it involves a large body of water, the turmoil is related to your emotional wellbeing. The tide goes out, emotions go cold and empty. Then they rush back and force their way through everyone's life. On the surface is the fear that you are anticipating some sort of conflict or turmoil here but your loved ones won't trust you. That's the surface.

Deeper, we have a similar setting, but we see that each character is a projection of part of you. And you see this turmoil coming. And you should move (read as "change") in order to keep safe through the tsunami...but you can't. The different parts of you won't change their ways, even though you know you should. It's like looking at the bigger picture from the view of someone almost uninvolved...too far away to make something happen. To move the parts of yourself, you have to interact with them...understand them...assimilate them as part of your "Whole Self".