Some would say it’s due to global warming and climate change.
Some would say it’s because of the quickly approaching 2012 and
the changes that it will bring about.
Personally, I ascribe to Gregg Braden’s explanation in
“Fractal Time – The Secret of 2012 and a New World Age”.
Fractal Time states that, due to the earth’s position in orbit and
it’s proximity to the sun, we will be experiencing weather changes
and natural changes. These changes have been scientifically shown
to occur in a pattern of time throughout the earth’s history.