A polar vortex is currently affecting Canada, resulting in extremely cold temperatures throughout the region. This meteorological phenomenon occurs when a large area of low pressure and cold air surrounds the Earth's poles, occasionally shifting southward and impacting weather patterns in the northern hemisphere. The current vortex has caused temperatures to plummet significantly below the average for this time of year, with some areas experiencing record lows. The cold air mass is expected to persist, leading to prolonged periods of freezing conditions.