In February 2025, despite global data marking it as the third warmest on record, vast regions of North America experienced an extraordinary and abrupt 36 in temperatures due to a phenomenon known as a polar vortex collapse. The polar vortex—a persistent mass of frigid, low-pressure air encircling the poles in the stratosphere—ordinarily remains contained by the jet stream, a high-altitude current that 37 weather patterns. However, when this vortex destabilizes, particularly through a sudden stratospheric warming (SSW)—a rapid temperature 38 of 50°F or more in the upper atmosphere—it can severely disrupt the jet stream’s flow, allowing Arctic air to cascade into lower latitudes. Meteorologists suggest another such disruption is imminent, potentially 39 parts of North America and Eurasia to anomalously cold conditions as late as early April. Although the precise role of climate change in exacerbating these events remains inconclusive due to limited long-term data, the 40 of a vortex collapse—ranging from atmospheric displacement to complete bifurcation of the vortex—can be severe, often resulting in prolonged periods of extreme cold well beyond the typical bounds of winter.