One of the most interesting classes I ever took was offered by the John F. Kennedy School of Government and trained students to apply insights from science to the making of sound public policy. My two professors for the class were William C. Clark and John P. Holdren. Together they were dynamite.
Holdren has been the Director of the Office of Science and Technology Policy for President Barack Obama since 2009. One of the projects he has overseen is the third National Climate Assessment (NAC), which was published on May 6, 2014. Here is an overview of the third NAC by Holdren.
The third NAC is a treasure trove of information about how climate change may affect the United States, in general, and each region of the country, in particular. One conclusion of this assessment is quite simple: it's neither the heat nor the humidity, but both simultaneously.