Well, I seem to remember you pouring scorn on the idea of doing cold storage in a hot climate. But, if it's just problems associated with global warming that you are concerned about, bear in mind that global satellite temperature readings have actually declined for the last six or seven years. Chicago has had its coldest June in more than 60 years.
Tucson, meanwhile, is hotter than Phoenix, and so is Las Vegas. Now that the rate of population growth in these western cities has flattened out, I don't see that power generation will be a problem. Other factors such as earthquakes, floods, tornadoes, and hurricanes seem significantly more important.
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