it’s not the heat, it’s the stupidity
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.

Someone where I work drives in a modified Charger that makes popcorn when he decelerates, loudly. That's the only science that matters where I live.
The upper class Republicans KNOW climate change is real but they want to keep profiting from climate change denial because they are amoral and greedy. They will gladly throw their base, and anyone else, under the bus for a few bucks.
A third of conservatives think the rapture is nigh. They are helping the antichrist and wars in the middle east so christ comes back, angry jesus, and lays waste to everyone except them, drowning the world in lakes of blood and fire. Bringing them to heaven.
That is just the evangelicals too they have other religious extremists in the mix with crazy ideas, then all the nihlistic business dickheads that would sell poison gas to nazis to make a buck without moral qualm.
Those are their base though, the primary voters. In the general it is a great share of low information voters and people that trust the worst people.
We castigate them trusting the worst people, while ourselves trusting figures from their controlled opposition so if you want to cast blame look inward first, we knew what they were and chose to support doomed to fail strategies, trusting those ivy league suits controlling business and government to know what they were doing to stop republicans and their outright rejection of reality.
With how divided we are already, we'll kill each other long before the climate does. Though, heat contributes significantly to aggression, so you could argue otherwise.