[Atk1d]

average Joe:

A pole shift might work like this,( i am only guessing) Fact: living in north america our toilets flush in a clockwise swirl, in australia counter clockwise swirl. the cause is the magnetic balance between the two apposing poles,theirs affected by the south pole. Now lets rapidly change them end to end.
(guessing part) Birds migratory habits would be affected,the tactonic plates might be affected by the shift, although caused by gravity of moon, but tides maybe affected,no one knows for sure, I'm merely guessing from all that I have read.
Do a google search on pole shifting for more potential answers

good luck