警惕“秋老虎”！昼夜温差大 心脑血管疾病患者需防范

Core Viewpoint - The article discusses the phenomenon known as "Autumn Tiger," which refers to a period of high temperatures persisting after the official start of autumn, particularly in southern China, where temperatures have reached up to 40°C [1][3]. Group 1: Weather Patterns - The Central Meteorological Observatory predicts that regions such as Jianghan, Jianghuai, Jiangnan, and eastern Sichuan Basin will continue to experience high temperatures in the coming week [1]. - "Autumn Tiger" is characterized by a sudden rise in temperatures above 35°C during the transition from summer to autumn, often occurring after a brief cooling period [3]. Group 2: Meteorological Factors - The main cause of "Autumn Tiger" is attributed to the abnormal control of the subtropical high-pressure system, which blocks cold air from the north and leads to prolonged sunny and hot weather [5]. - The weakening of summer winds and reduced rainfall contribute to lower humidity levels, making the weather feel drier and more comfortable, although high temperatures persist in certain regions until mid-September [3][5]. Group 3: Health Implications - The significant temperature variations during the "Autumn Tiger" period can increase the risk of cardiovascular diseases, particularly among the elderly [7]. - Medical professionals recommend that individuals with pre-existing health conditions maintain a healthy lifestyle, stay hydrated with 1500 to 2000 milliliters of water daily, and monitor their health regularly [7].