To see an arch in your dream, represents your support system.
To dream that you are passing under an arch, signifies new opportunities. You are headed toward a different direction in life.
before that, i was visiting my aunt in a mobile home park or something like that, and next thing you know i was in a huge wave. i didn't feel wet like i was swimming, so i could have been in a clear vessel which allowed me to move with the water and survive.
Dreams of impending disaster generally indicate that the dreamer is feeling out of control. In the case of the tidal wave, this out-of-control feeling is often combined with the need to make a fresh start.
To dream that you are caught in a tidal wave, signifies the strength of your emotions, perhaps accompanied by tears that you are holding back in your waking life.