Check out 1936

No doubt Texas,Oklahoma and Kansas(to name a few)
have been hot this summer+

Here's an interesting read.

The only part you need to click on is right below this

<a href="http://www.wunderground.com/blog/weatherhistorian/article.html?entrynum=33%3C/ a"> http://www.wunderground.com/blog/weatherhistorian/article.html?entrynum=3 3"> http://www.wunderground.com/blog/weatherhistorian/article.html?entrynum=33</a>

Another interesting note on this past/current heat wave.

During the 1930s, there was a high frequency of heat waves due to high daytime temperatures resulting in large part from an extended multi-year period of intense drought. By contrast, in the past 3 to 4 decades, there has been an increasing trend in high-humidity heat waves, which are characterized by the persistence of extremely high nighttime temperatures. In particular, Gaffen and Ross (1999) found that summer nighttime moisture levels increased by 2 - 4% per decade for every region of the contiguous U.S. between 1961 - 1995. Hot and humid conditions at night for a multi-day period are highly correlated with heat stress mortality during heat waves.