I've seen 113 in the shade when I worked a summer field job in Davis, California, at the University "farm"... And hotter in the Mohave desert and Death Valley... but not 120 and not at work...
It can get into the 90's for a few weeks each summer here, and occasionally tops 100, but it usually cools down overnight.
I'm wondering... with humidity so low, would a giant swamp cooler help to bring down the temps? How about photovoltaic solar panels on the roof to generate enough juice to run conventional A/C?
Anyway, I'm glad in a way that this is just a heat related shutdown. When I saw the title I thought that you'd gone out of business...