As I've reported in the past, the three-year and four-year La Ninas have given Dallas/Fort Worth the hottest summers on record for total 100-degree days:

1998 - 56, 1999 - 33 and 2000 - 46

2010 - 29, 2011 - 71, 2012 - 34 and 2013 - 28

We may be due for another blazing hot summer in North Texas.