The last time global temperatures averaged 4 degrees higher there were palm trees at the arctic. At 8 degrees, clouds no longer form. Some estimates have us headed for the 3.2-3.5 range as an optimistic outcome. (Uninhabitable Earth)
The climate is getting colder & the Antarctic glaciers are growing, so no worries about palm trees in Antarctica. We will have lower food production (there goes the "green revolution"), more volcanic eruptions, more earthquakes, a magnetic pole reversal, with a weakened Heliosphere & Magnetosphere making us less protected against space weather though, so at least you will have that to be alarmed about.
BTW, ancient people around the world had some interesting & consistent art that looks strikingly like plasma discharge reproduced in laboratories. Maybe they were smarter than what we give them credit for?