Never had AC on the Peninsula. We have heatwaves every year. This summer has been remarkably mild, low 70s most of July and August until now. We got our heatwave. A bit more humid than normal thanks to tropical storm remnants, 70f dewpoint and 95f on Sunday, 65f dewpoint and spiked to 105f Saturday briefly.
It seems fractionally warmer than most heatwaves, and slightly longer, but doesn't 'feel' indicative of a trend.
Still no A/C, and I guess I notice it more now that I'm home 24/7, but still totally do-able.
Been running the house fan overnight to get the rooms down into the mid-high 70s.