It's not true that if you slowly turn up the heat, a frog won't notice that his surroundings are getting hotter - the frog will jump out of the pot if he can. That's an allegory - but whether humans will recognize & respond to their warming climate is a very real & open question.
Mainstream media coverage of Friday night's extreme storms in the Mid-Atlantic region shows no sign of hoppiness:
Reading these stories, I can't help but think of Collapse: How Societies Choose to Fail or Succeed by Jared Diamond. Past dominant societies have proved quite capable of blissfully ignoring all evidence of impending doom. So far, America's media is proving no different. Will 2012's record temperatures and extreme weather change that? Or be just another milepost on the road to disaster?