Two climate researchers provide a guide to the hottest and coolest places on ASU’s Tempe campus as the fall semester opens amid a late summer heat wave. Ariane Middel (pictured) and Scott Krayenhoff, affiliates of ASU’s Urban Climate Research Center, did a three-year study to determine where the campus environment offers the most respite from the heat. It’s all about the shade, says Middel, whose research is aided by a mobile weather station she created to measure radiant heat outdoors. She found the formula for coolness on campus terrain is grassy areas well-shaded by trees. Middel is an assistant professor in the Fulton Schools with a joint appointment in the School of Arts, Media and Engineering. Krayenhoff is an assistant professor of environmental sciences at the University of Guelph in Canada. (The report is a recent update of an article originally published in 2019.)