California does OK with climate change. Rising ocean levels aren't a big deal, because the coast of California is mountainous. Even where it looks flat, like Venice Beach, go 3 blocks inland and you're usually 20 feet up. San Francisco has some low-lying areas near the coast, but they're small enough and valuable enough to justify big seawalls if necessary. It's not like Florida or New Orleans, which are barely above sea level now.

Hotter is a problem, but CA isn't going to heat up to unlivable levels, like parts of India.