The _state_ isn't alarming, it's the rate of change. The transition is happening on a scale of human lifetimes instead of geological time.

Yeah. The XKCD "Timeline of Earth's Average Temperature" is, I'm pretty certain, the most frightening chart I have ever seen.

https://xkcd.com/1732/

Precisely. Humans can adapt to almost anything but we can not do it fast enough with 8 billion+ people.