Since I've never lived in the US, I can't answer your primary question, but you've described expectations of climate change which will partially inform your decision on where you'll live and climate change may not necessarily manifest as uniform global warming. The thermohaline circulation currently acts as a giant engine bringing warm ocean currents to North America & Europe. I have long harboured concerns that the dual climate change potential impacts of thermohaline slowing and weakening of the polar vortex jet stream might cause paradoxical colder weather in these countries (where members of my extended family reside), even as other places are roasted by climbing temperatures.
