Why would they build data centers in Arizona? The outdoor heat would seem to increase cooling costs, made even more expensive because the data centers' demand

Why would they build data centers in Arizona? The outdoor heat would seem to increase cooling costs, made even more expensive because the data centers' demand would maximize just as everyone else's demand does: the hottest days, the hottest times of the day, the latter made even worse because I'd expect the hottest times of day to be the busiest for the data center. Is there abundant, cheap power in AZ? Do the data centers use solar?