I'm 110% on board with global warming, but this graph is misleading.

The author needs to at least correct for population changes (heat deaths per X residents). Even better would be to account for changing demographics, like age and county. From this random stats website, it looks like there has been a dramatic increase in proportion of older residents since 1970. Old people are more likely to die, so more elders = more deaths.

If I wasn't about to head to bed, I might try to fix it, but.... sleep.

Oh, and I'm pretty sure there has been an increase in small plane crashes in AZ. The hot air is much thinner than most pilots are used to, so they tend to forget accounting for changes in thrust and climb rates. I'm pretty sure a couple happened in just the last few weeks.

rates. I’m pretty sure a couple happened in just the last few weeks.

I’ve heard of articles saying that global warming is already leading to more air turbulence and that it is only going to get much stronger by the mid century

Yes. Hot air is thinner, so there's less lift on aircraft wings. There's actually a conversion they're supposed to use that basically says, 'At this temp, treat the plane as if it's actually at this other, much higher, altitude."

Here's one of the recent videos I've seen mentioning it (around 5 min in they mention the "density altitude"). I'm not a pilot and just find the stuff interesting.