That global warming is real scientifically proven and the CO2 released by human activity is the major reason that it is happening;
Yes. I understand that.
completely unrelated to what was being discussed here...not sure why you want to draw attention to some significant comprehension problems on your part. Its a bit like quoting high school basketball scores to argue about the viability of electric cars...interesting but completely unrelated and to be honest, inane.
So apparently you all think I've made this up (just go and get the US climate history network data and plot it yourself) but are you going to argue that the US Global Change Research Program also made it up?
USGCRP, 2017: Climate Science Special Report: Fourth National Climate Assessment, Volume I [Wuebbles, D.J., D.W. Fahey, K.A. Hibbard, D.J. Dokken, B.C. Stewart, and T.K. Maycock (eds.)]. U.S. Global Change Research Program, Washington, DC, USA, 470 pp., doi: 10.7930/J0J964J6.
Here are two plots from that study clearly showing the higher heat waves in the 1930's than recent.


and this has been presented numerous times in the published literature. Example:
Peterson et al, 2013. Monitoring and understanding changes in heat waves, cold waves, floods and droughts in the United States, State of Knowledge. Bulletin of Amer Met Soc., pp 821 – 834
DOI:10.1175/BAMS-D-12-00066.1

And with that I'm done with the topic.