Temperatures above 50C used to be a rarity confined to two or three global hotspots, but the World Meteorological Organization noted that at least 10 countries have reported this level of searing heat in the past year: the US, Mexico, Morocco, Algeria, Saudi Arabia, Kuwait, Iran, Pakistan, India and China.
In Iran, the heat index – a measure that also includes humidity – has come perilously close to 60C, far above the level considered safe for humans.
Heatwaves are now commonplace elsewhere, killing the most vulnerable, worsening inequality and threatening the wellbeing of future generations. Unicef calculates a quarter of the world’s children are already exposed to frequent heatwaves, and this will rise to almost 100% by mid-century.
The power used by AC is responsible for ~3% of global emissions. I can’t find data about the impact of refrigerants ATM, but I assume it’s significant because of their extremely high “global-warming-potential.” I’m guessing a significant amount of emissions come from the manufacture of refrigerants, and a significant amount of refrigerants leak out of systems when they fail (or are improperly disposed of).