I a not certain about these issues, I just find it intriguing. Given our Biblical foundation as a society, it is interesting to read the description in Isaiah 24 which seems to describe a Polar Shift. I could be wrong, however scientist confirm that these have happened in the past. Those who claim to know are false prophets, no doubt.
Who knows. It’s a fact these shifts have happened in the past so there probably will be one in the future. Man wasn’t around for the last one so we really don’t know what effects it would have. The effects on migratory animals sounds reasonable but beyond that I’d say may be overt unnecessary concern. The earth survived all the shifts in the past, life will go on after the next one (assuming we live that long as a species ourselves; I strongly think He will return wayy before the next is due).