To my knowledge a lot of ACs can't even operate at those temperatures, or only in a degraded fashion. The optimal maximum outside temperature of mine apparently is 35°C. After that the radiator can't get rid of the heat fast enough to have the inside unit work at full capacity.

There are genius ways to build homes that get cooled down even without electricity. See the "earthship" design for example, routing fresh air through pipes in the ground where it cools down, going through the home as the hot air gets sucked out by a "thermal chimmey" (literally creates airflow by using the sun). If we combined that with good insulation to avoid the sun heating up walls and windows we'd have liveable temperatures inside even at 50°C outside. But western countries not even remotely progressive enough for such a radical but necessary structural shift, so even right now we keep building houses designed to trap heat.

Solar panels and air con are a good short-term solution for the symptoms

And by short-term I mean my whole life

That would make the oil lobby sad though

The problem is that treating the root cause is not profitable. So it will never happen. Ever.

There is no treatment for the root cause, lol either we continue to pump co2 into the atmosphere or we stop. Either way, temperature increase is locked in for roughly a century at this point. We lost the fight for a livable planet. The human extinction event continues