The greatest change everyone should expect to see in the coming decades from climate change is .... mass migration.
As soon as the heat, flooding, hurricanes in the southern United States get worse, all those people are moving north, first to the northern states and then to Canada. As soon as forest fires get worse and destroy more land and communities, people like me in rural northern Ontario will migrate to cities and towns and to southern Ontario.
If conservatives think immigration is bad now, the future is going to have millions of people moving to places they don't want to go to to be greeted by people who don't want them there.