As of today, the polar ice caps have melted, the seas have boiled, and the world is doomed. But don't worry, it's not like it'll be a big deal or anything.
Current Temperature: +5°C above average
Projected Temperature Rise: +100°C above average (give or take a few degrees)
Recommended Course of Action: Panic, riot, or just go ahead and live in a bunker, whichever you prefer