Interesting story, but why in Mexico?
The cliché is true during the hottest hours, but it fails to admit that it is simply because most activity moves to the twilight hours when the heat subsides.
When I left, I thought it was so stupid to build these big offices near the desert and to pack them full of people working 9 to 5 with massive amounts of aircon, effectively imposing on them the Northern European way of life - folks have been inhabiting those areas for millennia, they know how to properly deal with the environment they live in, let them work at night instead and save all that energy.