[pyk]

To piggyback the above comment, the recent Nature[1] article about centuries-old baobab trees mysteriously dying over the past decade of warmer-then-even-warmer temperatures is what hit me. A potential litmus test for our future as a species.

I suspect we will see more and more accumulation of research on impacts rather than just predicted impacts as we continue to experience increased temperatures. Although you do not have to touch a flame to know it will burn, more and more real world instances of getting "burned" are harder and harder to ignore.

"The researchers found no signs of an epidemic or disease, leading them to suggest that changing climates in southern Africa could be to blame — but they stress that more research is needed to confirm this idea."

[1] https://www.nature.com/articles/d41586-018-05411-7