The cumulative heat in summers is rising, meaning there is less relief from warm temperatures once summer begins. (Unsplash/Evgeniy Beloshytskiy) Do you have the sense that summers feel different than when you were younger? That they start earlier, arrive quickly and remain intense until the fall? If you live in the mid-latitudes of either the Northern or Southern Hemispheres, chances are you answered yes. For many, the idea of a longer and warmer summer conjures up images of spending more time