“… I barely broke out a sweat because there is no humidity...”
I went to AZ in August, did a night swim in my friend’s pool. Nearly froze in 90 degree heat because the evaporation rate was so high.
I have a friend who lives there. Their in ground pools have a system to inject air into the water to cool it down. Plus, they have to constantly add water to their pools due to evaporation.
This is totally inverse of having a pool here in NH. I had an in ground pool at my former house. I kept a solar cover on the pool whenever we were not using it to keep the heat in. Evaporation also was not a big problem because our summers tend to be more humid.