Extreme weather conditions will be paradise, not the worst case scenario. When we reach 3 degree mark we are going straight up to 4 and then 5. Between 5 and 6 degrees the world is over in the most spectacular apocalyptic way you can imagine. How far away is this? I’m guessing your kids won’t want to have kids to spare them the suffering of 4 degree rise. At that point we will be fighting wars, billions will need to migrate north, nukes are on the table. The sad thing is, once we get there we have inevitable human extinction. Fresh water and food shortage will be a massive problem. A few or more billion people will die. How you get to extreme weather as the worst case scenario is beyond me. Look at how complex ecological systems are and how they affect one another. Acidification will bring about ocean life extinction and phytoplankton suffocation. Ice will melt, all of it, sea levels will rise, ocean currents totally screwed up, superstorms, flash flooding of biblical proportions will displace everyone in the coastal region. Migrations will trigger wars, food will become a luxury, methane will trap more heat, ozone will poof, enjoy your cancer.