It's possible to protect against heatwaves on a city level. Increase the albedo value of the city by doing the following: Incentivize lighter colored roofing and walls, grow leafy trees for shade, cover parking lots with solar roofing (and add EV chargers). Basically do whatever possible to reduce the amount of asphalt and darkish materials in general, being hit by sunshine.

No it won't save your ass when ambient temperature is 50C, but considering that cities are by their very nature hotter than the ambient temperature out side of the city, these things would help reduce that gap.

Shame I'm a fat old guy now. A few decades back I looked great in a Laura Ashley summer dress.

Just sell it as a modern take on (manliest of manly) Roman and Greek tunics. Alpha bros will be drooling for it in no time. That, however, will ruin the purpose by making the dress unwearable again so nah.

Scientists do actually make attempts to investigate the contribution of the trends to specific events, it's called extreme event attribution, but it is a very young field and the error bars on everything are still huge. That said,

The American Meteorological Society stated in 2016 that "the science has now advanced to the point that we can detect the effects of climate change on some events with high confidence". [12]

But the quote from the article was strictly correct in saying "it's hard".

It started out hotter than it would be and the heatwave is at least a few degrees more severe than it would be otherwise.

man if only there was a way to link the changing climate to climate change

No, individual extreme events are not "changes in climate". It's easy to say that the rise in heatwaves is caused by climate change but it's much harder to prove that this specific individual heatwave would never have happened were it not for climate change.

It's an endless loop if you think about it

C * dolly Parton + freezing temp in F

"Double it and add thirty" is accurate enough for ambient temperatures, and easier to do in your head. If you need scientific accuracy then you wouldn't be using Fahrenheit anyway.