South Carolina is bracing for an unexpected heat surge as spring approaches, with temperatures predicted to rise significantly above average for late March. This heatwave is part of a broader weather pattern affecting the southeastern United States, driven by a high-pressure system that promises clear skies and prolonged sunshine. Residents are advised to prepare for conditions more typical of late spring or early summer, taking precautions to stay hydrated and avoid strenuous activities during the hottest parts of the day.