The Gulf Stream plays a significant role in maintaining the climate of the US East Coast and Western Europe. “We conclude with a high degree of confidence that Gulf Stream transport has indeed slowed by about 4% in the past 40 years.” The full study is Here
Rise in sea levels on the east coast, reduced rain in the east coast, stronger storms, and more precipitation in Europe and the tropics. According to wiki.
I think it’ll also make some areas cold as fuck and probably heat up the gulf.