Philadelphia considers itself a coastal, as well as a river front town, due to it's location along a river emptying into the Atlantic nearby. Where this location helped Philadelphia develop in its early days, this dual access to moving water will be to its detriment during the pole shift. During the hour of the shift and the hours following, there will be torrential rains swelling the rivers, as well as tidal waves roaring up the bay. The clash of these waters will come near Philadelphia, with the effect that the city streets will be inundated, with housing collapsing and debris crashing about in the waves. With ocean ships afloat in the streets, even high rises cannot be considered safe, as they can sustain collisions and collapse. This is not a safe city to ride out the pole shift, as few cities frankly are.