I'm very grateful I have air conditioning in my home, office and car this summer. It's been quite hot and I don't remember it being so. This inspired me to do a bit of research.

This is from NOAA:

Since the beginning of the 20th century, temperatures in New York have risen almost 2.5°F, and temperatures in the 2000s have been higher than in any other historical period (Figure 1).

NOAA's statement reminds me of Glenn Frey's song, The Heat is on...

The heat is on 
On the street 
Inside your head 
On every beat

And the beat's so loud 
Deep inside 
The pressure's high 
Just to stay alive 
'Cause the heat is on