Near Phoenix
FWIW, El Mirage is about 15 miles(25km) NW of downtown Phoenix and Goodyear is about the same distance due West of Phoenix. It is said that early Catholic missionaries reported back to the Vatican that in Winter the natives in the region saw no particular attraction to Heaven and in Summer (which lasts about 8 months), they saw nothing about Hell that sounded worse than where they were. It's about the last place I'd put an installation that required a lot of cooling, but maybe Microsoft got a really good deal on land, taxes, and power.