The trend from 1980 is definitely flat over all. 2010 has a definite spike, highest in the range, but there is a however.
Summer TMax range, highest, lowest, average and standrd deviations for years 1973-2009. Thick black line is 2010.
Notice that spike wasa one off day emerging above the previous years’ highest TMax. But not a month and a half later, 2010 also spiked below the lowest to have one of the coolest days. Over all 2010 was above the average.
Count of days over 43C.