We’re in a heatwave, so why is a ‘cold blob’ in the Atlantic causing so much concern?

Wire excerpt

We’re in a heatwave, so why is a ‘cold blob’ in the Atlantic causing so much concern? The Independent Collapse of Atlantic Currents May Already Be ‘Locked In’ Yale E360 Collapse of AMOC ocean current may already be locked in New Scientist A Cold Atlantic Anomaly Returns as Super