They're talking 10 gigawatt data centers now. That's multiple small countries worth of power consumption and consequently heat generation. I live in a country of a million point something people and our peak is 1.6 gigawatts. For the entire country. Including multiple non-AI data centers.

You can improve the HVAC efficiency but fundamentally you still have gigawatts of heat generation to dissipate. You know what's really good for that? Evaporating water, especially in a desert where humidity is low.