Oklahoma climate history.
Number of days per year reaching 100 degrees:
1936: 65 days over 100 degrees, including 36 consecutive days over 100 degrees
2012: 38 days over 100 degrees
2013: 7 days over 100 degrees
2014: 7 days over 100 degrees
2015: 3 days over 100 degrees
2016: July 22 was the first day of 2016 over 100 degrees
Do you see a trend for Oklahoma?
It's definitely not a warming trend.
There is no warming trend because NASA does not own Oklahoma state temperature data, and can not "adjust" it to show a warming trend.
NASA takes raw temperature data from around the world and "adjusts" it for their estimates of the average global temperature from surface thermometers.
The "adjustments" usually create more global warming than shown in the original raw data.