"... I'm not looking for someone to 'blame' ..."   Ah!  Well, that's good to hear.

"... human action has caused a shift in our weather patterns ..."  And, perhaps in ways which many haven't even considered.  In a recent edition of _Science_ magazine (issue of 1 September), there is an article titled 'How An Ocean Climate Cycle Favored Harvey'.  Unlike Mr. Doppelt in the RG, this article attributed our hurricane season largely to the Atlantic Multidecadal Oscillation, which influences marine surface temperatures.  The warmer the ocean surface, the more intense the storm.  The article states, "... aerosol emissions ... were the primary cause of the most recent cold phase of the AMO ... (a) subsequent drop - *thanks to clean air regulations in the United States and Europe - may have instigated the current warm phase* ..."  

Yep - you read it right.  Clean air = more powerful hurricanes.  Talk about Unintended Consequences!  :D