Wow, Mary Anna, interesting find!
I live on the Mediterranean sea and on August 18th I had a dream that we were hit with a HUGE tsunami:
I was in my bedroom when I heard the sea sucking out away from the shore. Then a huge wall of water came in, and I saw it had reached to my fourth floor window. I could hear the building groaning against the weight of the water. Then the water receded. Not long after,  I heard it suck out AGAIN, and there was a SECOND wave, coming in a great deal faster than the first one. I woke up.

JDSiegel