Thats true. And central AC is much more common down there. Northeast cities were developed before they was AC or even cars. Down there people go from central ac home, to ac in the car, drive to store with ac and ample parking nearby. Meanwhile people in NY tend to experience the weather more directly every day.
Subway platforms, while always super hot, felt like a new level today. If records were kept on that, it would of broke it. Somewhere in the 110s wouldn't be surprising at stations like Union Sq or BK Bridge.