When a properly installed heating and ventilation system is available, adding air conditioning is not that big of a deal. It usually comes part and parcel, hence the term HVAC. I can't imagine a large complex of any kind without it simply because of the need for fresh air.
Again, I think the cause of the guys death was neglect, not the heat.
Maybe it was those two variables together that were lethal.
For instance if a baby gets forgot & left in the backseat of a car on a 60 degree day in April, it wont have the same consequence as the same event on a day that gets much hotter very fast in August.
I don't know why, but this causes a memory to return..,
Indians are stereotyped as very smart but not much common sense and it plays out sometimes.
I knew a very smart accomplished Indian couple who almost drove off with their new son on the roof of the car, another time they actually forgot him and came back to find him on the top of another car they had parked beside of.
Wolf