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Want some proof? How about this?
Amarillo, Texas, averages six days a year with a temperature at or above 100 degrees. The record for most 100-degree days in a single year was 26 in 1953. In 2011, Amarillo reached 100 degrees 50 times.
http://www.srh.noaa.gov/news/display_cmsstory.php?wfo=ama&storyid=70932&source=0
I’m not sure how this affects me personally--so who cares?