Do you think air conditioning is a luxury or necessity?

Just learned 40 people drowned in Europe due to a current heat wave Europe is having.
Only 10% of Europeans have air conditioning in their homes while in the U. S. it’s 90%.
Per capita the U. S. sees 3 to 8 heat related deaths per million while Europe has 60 to 200 deaths per million. I never realized there was such a big difference.
Do you think air conditioning is a luxury or necessity?
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