Heart attack cases are increasing, particularly among younger working professionals in their 30s to 50s, according to a cardiologist. Cold weather exacerbates existing conditions by constricting blood vessels, raising blood pressure, and increasing blood clotting risk. Lifestyle factors like disturbed sleep, stress, poor diet, and lack of exercise during winter also contribute. Pre-existing conditions such as diabetes, high cholesterol, and obesity significantly multiply the danger, with smokers and diabetics showing more severe blockages.