Right, but if that current shuts down, that means the transfer of warm and cold currents that power weather patterns across the entire northern hemisphere will be disrupted.
The last time that happened, the entire northern hemisphere basically froze over. If you live north of the equator, whether it’s North America, Europe, or Asia, the result would be similar: no more warm seasons and freezing to the point of glaciation, from what I understand. I’m not a climatologist, though.