As climate scientists release new evidence pointing to the possible “collapse” of the Gulf Stream, experts are warning that its disappearance would usher in a “calamitous climate catastrophe” not just for Canadians living on the east coast, but for hundreds of millions more people worldwide. The warning comes amid a new study published in the journal Nature Climate Change, which found evidence of the Gulf Stream losing “stability” over the course of the last century. Should the stream continue to lose strength and eventually collapse, the study’s author warned of “severe impacts on the global climate system.”