Group 1 - The article discusses the ongoing high temperatures in North China, with some areas exceeding 40°C, and provides guidance on preventing heatstroke and emergency treatment [1] - Recommendations for preventing heatstroke include wearing light, loose, and breathable clothing, staying hydrated with at least 1500ml of water daily, and consuming fruits and vegetables to replenish lost fluids [2] - It is advised to maintain a regular lifestyle, reduce outdoor activities during peak sun hours, and prepare cooling medications for long outings [2] Group 2 - Heatstroke can be categorized into three stages: pre-symptomatic, mild, and severe, with symptoms ranging from dizziness and fatigue to high body temperature and potential loss of consciousness [3][4][5] - For pre-symptomatic heatstroke, it is crucial to move to a cooler environment and hydrate with cool drinks, while common medications include herbal remedies and cooling oils [6] - Special precautions for elderly patients with chronic diseases include regular hydration, reduced physical activity, electrolyte replenishment, and maintaining contact with family for assistance [7][8]