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I did a HUGE amount of research on keeping them for a while. Even though I had a line on a well known heat-resistant strain of New Zealand Whites from Texas A&M, I came to the conclusion that it would be too much work to keep them comfortable in our heat. The one farm that used to raise them told me that they stopped because it was miserable and the rabbits didn't have comfortable lives because of the heat - they just didn't want to do it any more. I bet they do really well in your climate (pet or meat).
Hypothetically could you keep them in underground -as in dig a hole like 12x12 and put the cages against the walls to keep cool. Sunlight would still get in just not too much.
I could see all sorts of nasty critters could also fall in though so that would need to be resolved/prevented.
Don't know about underground, but there used to be a guy around here who showed rabbits; kept hundreds of them in a big steel building (enough for a horse show ring & then some) with exhaust fans for air exchange.