I see them Mexicans on them roofs in this shit and wonder how in the Hell they do it.
The majority of real Mexican's have never had air conditioning. They have those swamp coolers at best.
It wasn't until recently that air conditioning became common in most of the Country.
Most of the infrastructure can't handle the loads generated by true AC and it's expensive.
I see them in the Chihuahua desert when it's 105F, driving around in cars with no AC, windows down.
My GF's sisters house was built 5 years ago, only has a swamp cooler. On a 100F day that house gets down to maybe 80-82. So they open the windows. The only person struggling with the heat is me, the gringo.

They are used to living like this, only the rich people and tourist locations have AC.
Some people are starting to buy those split AC systems and install them in houses, but most of the population is too poor to afford them or their electrical system can't handle it.