High tide/Low tide

[Hilladelphia]

View from my window suprisingly wide angle of a pleasant beachside shoreline, small outcroppings and surf worn rocks, low flat tidal area...suddenly upon second glance it is fuller than mere high tide & seems to be advancing higher still - yet not with great rapidity. Next view:water has suddenly receded, tsunami fashion. I am slightly confused as I think, it goes out first, then rushes back in? (Not the other way around?) but it is fully happening and I am talking, almost yelling myself hoarse into my cell phone - very aware this is a event of some magnitude - trying to alert others. Next, after telling at least two people, my daughter & a man -phone ceases to function -digital display indicatesmalfunction and in effect it isOFF