Artists & Illustrators magazine - Summer In The City

I have just been commissioned by the editor of Artists & Illustrators magazine Steve Pill, to write a feature for their "Summer" issue (not sure which month yet). The theme of the issue is "Summer In The City" with my feature being the "Masterclass" section of the issue, a twelve stage step-by-step demonstration of how I paint cityscapes in oil. Initial thoughts are revolving around sunlight bouncing off pavement, probably afternoon light, heat, shadows of people, maybe somebody catching some shade, a busker?....I am tempted to make it hot and oppressive but it would be nice to avoid a sour note for a change in one of my paintings! Yes, let's try and get across the feeling of heat in the city. I don't intend to illustrate the Lovin' Spoonful song.....although having just read them, the first part of the song about the daytime does seem to be what I am thinking about.