Who could have possibly predicted such a thing
Climate
Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.
As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades:

How much each change to the atmosphere has warmed the world:

Recommended actions to cut greenhouse gas emissions in the near future:

Anti-science, inactivism, and unsupported conspiracy theories are not ok here.
So Far...
normalizing extremes
We're reaching into another Selection Bias style event, wherein the folks who can afford A/C or simple endure the misery a bit longer get to say "Not a big deal, stiff upper lip, yadda yadda". Meanwhile, the folks who are bankrupted by skyrocketing utilities and killed by heatstroke don't get to pen any Op-Eds or deliver sanctimonious diatribes on national news broadcasts about the innate Britishness of being miserable.