From what I am reading this from the Scientific Community is saying this is happening because of Climate Change..
Conspiracy Theorists are saying this is the Pole Shift identified in the Mayan Calendar of 2012
and some like myself believe this is Biblical Prophecy happening in our generation...
Luke 21:28
And when these things begin to come to pass, then look up, and lift up your heads; for your redemption draweth nigh.
My understanding is that this is nothing new. This actually happened over 2,000 years ago and we’re just being told about it now.