Core Viewpoint - The article highlights the ongoing extreme heat wave affecting multiple regions in China, with temperatures exceeding 35°C and reaching as high as 40°C in certain areas, prompting health risk warnings and advisories for the public [1][2][4]. Group 1: Heat Wave Impact - The Central Meteorological Observatory issued a yellow warning for high temperatures, predicting daytime highs above 35°C in regions including southern North China, Huanghuai, Jianghuai, Jianghan, and much of Jiangnan [1]. - Specific areas such as the Turpan Basin in Xinjiang, northern Shandong, and central-northern Henan may experience temperatures exceeding 40°C [1]. Group 2: Health Risk Warnings - The National Disease Control and Prevention Bureau, in collaboration with the China Meteorological Administration, has issued continuous high-temperature health risk warnings, advising the public to avoid outdoor activities during peak heat hours and ensure adequate hydration [2]. - The high-temperature health risk warning differs from regular high-temperature warnings by focusing on the potential health impacts of elevated temperatures, categorizing risks into five levels: low, moderate, high, and extremely high [2][4]. Group 3: Symptoms and Emergency Measures - Symptoms of heat-related illnesses include dizziness, thirst, fatigue, and elevated body temperature above 38°C, indicating potential heat stroke [5]. - In cases of severe symptoms such as a body temperature exceeding 40°C, confusion, and rapid heart rate, immediate medical attention is required [7][9].

Group 1: Weather Impact - A strong heatwave is affecting multiple provinces in China, with high temperatures expected to persist, particularly in Jiangsu, Zhejiang, Fujian, Jiangxi, Hunan, Guangdong, Guangxi, and others [1] - The Central Meteorological Observatory issued a yellow alert for high temperatures, predicting daytime temperatures above 35°C in various regions including North China, Huanghuai, Jianghuai, Jiangnan, and parts of Xinjiang [1][4] - The maximum electricity load in China reached a historical high of 1.465 billion kilowatts on July 4, 2023, an increase of nearly 150 million kilowatts compared to the same period last year [1] Group 2: Meteorological Analysis - The current high temperature and humidity levels are considered unusual for this time of year, with significant heat observed in northern regions before the traditional "Minor Heat" period [2] - The phenomenon is attributed to the early northward movement of the subtropical high-pressure system, which has led to widespread high temperatures and moisture transport from the ocean [2] Group 3: Health Concerns - There has been an increase in cases of heat-related illnesses such as heat stroke, with reports of patients experiencing severe symptoms due to prolonged exposure to high temperatures [5][7] - Recommendations for preventing heat-related illnesses include avoiding outdoor activities during peak heat hours, wearing light clothing, and staying hydrated with electrolyte-rich fluids [8][10]

Core Points - The article discusses the rising temperatures in various regions, with some areas exceeding 40°C, leading to an increased risk of heatstroke [1] Group 1: Heatstroke Symptoms - The progression of heatstroke typically includes premonitory symptoms, mild heatstroke, and severe heatstroke, with heat stroke being the most critical state where the body loses its ability to regulate temperature, leading to multi-organ failure and a mortality rate as high as 70%-80% [2] - Symptoms indicating premonitory heatstroke include dizziness, headache, fatigue, thirst, excessive sweating, palpitations, and lack of concentration [3] - Heat exhaustion may present with symptoms such as excessive sweating, cool and clammy skin, pale complexion, nausea, dizziness, increased heart rate, low blood pressure, and decreased urine output [3] Group 2: Prevention of Heatstroke - It is advised to avoid prolonged exposure to high-temperature and high-humidity environments, taking breaks every 30 minutes when temperatures exceed 32°C or humidity exceeds 60% [4] - Staying hydrated, especially with salt-containing fluids, is crucial [4] - A light diet is recommended, avoiding greasy and spicy foods, as well as alcohol and smoking, which can increase susceptibility to heatstroke [4] - Consuming cooling beverages and seasonal fruits, such as mung bean soup, green tea, and watermelon, is beneficial [4] Group 3: Handling Heatstroke Symptoms - Patients should be moved to a cool, ventilated area, and their clothing loosened to aid cooling [5] - Environmental temperature should be lowered using fans or air conditioning [5] - If the patient is conscious, encourage them to drink fluids, preferably those containing salt [5] - In cases of severe symptoms like unconsciousness or respiratory failure, immediate medical assistance should be sought [5][8] Group 4: When to Seek Medical Attention - Persistent high body temperature exceeding 40°C warrants medical attention [6] - Continuous headaches and muscle spasms are also indicators for seeking help [6][7] - Symptoms such as confusion, extreme weakness, and loss of consciousness require immediate medical intervention [8] Group 5: Incorrect Handling Methods - Rapidly moving a heatstroke patient to an excessively cold environment is not advisable; a suitable temperature range is 22°C to 25°C [9] - Using very cold water for cooling can cause blood vessel constriction, hindering heat dissipation [10] - Self-medication with antipyretics is not recommended as they are ineffective in cases of heatstroke [11]

Core Viewpoint - The article highlights the dangers of heat stroke, particularly heat stroke as a severe form of heat-related illness, emphasizing the need for awareness and timely intervention during extreme heat conditions [1]. Group 1: Heat Stroke Overview - Heat stroke is characterized by a failure of the body's cooling system, leading to a core temperature exceeding 40 degrees Celsius, which can result in a high mortality rate of 70% to 80% [1]. - Early symptoms of heat exhaustion include dizziness, fatigue, thirst, and excessive sweating, with body temperature typically not exceeding 38 degrees Celsius [1]. Group 2: Identification and Emergency Response - Key signs of heat stroke include abnormal skin color, excessive sweating or lack of sweating, severe headache, confusion, rapid heartbeat, and gastrointestinal distress [1][4]. - Immediate first aid measures include moving the patient to a cool, ventilated area, removing excess clothing, and employing cooling techniques such as cold water immersion or using fans to enhance evaporation [4][5]. Group 3: Prevention Guidelines - For northern regions experiencing dry heat, recommendations include staying indoors during peak sun hours, staying hydrated, and wearing breathable clothing [5]. - For southern regions with high humidity, it is advised to maintain indoor temperatures around 26 degrees Celsius, limit strenuous activities, and consume a light diet rich in fruits and vegetables [5]. Group 4: Importance of Awareness - Experts stress that heat stroke often occurs when individuals are complacent, and having knowledge of prevention and emergency response can significantly improve survival rates [6].