Under the influence of prolonged heat, members of the public should stay on the alert to prevent heat stroke or other discomforts related to very hot weather and pay due attention to health conditions. If symptoms such as dizziness, headache, nausea, shortness of breath or confusion develop, take rest and seek help immediately, and seek medical advice as soon as possible.
Elderly persons, pregnant women, infants and children, those with chronic illnesses, such as heart disease or high blood pressure, as well as the obese are more vulnerable to heat stroke. Watch out for any symptoms of heat stroke. When engaged in work under hot weather or high-temperature environments, please refer to the Guidance Notes on Prevention of Heat Stroke at Work of the Labour Department and take necessary precautions. When engaged in outdoor activities, drink more water and avoid over exertion. If not feeling well, take a rest in the shade or cooler place as soon as possible. Perform outdoor activities in the morning or late afternoon. During indoor activities, replenish water timely. If there is no air-conditioning, then windows should be kept open and fans be used as far as possible to maintain adequate indoor ventilation. Public facilities with heat sheltering may also be used. Avoid prolonged exposure under sunlight. Light-coloured and air-permeable clothing, a wide-brimmed hat that covers the back of your neck and ultraviolet (UV) blocking sunglasses can reduce the chance of sunburn by solar UV radiation. Choose a broad-spectrum water-resistant sunscreen product with a sun protective factor (SPF) of 30 or higher when doing outdoor activities and apply liberally; reapply every two hours if you need to stay outdoors for a prolonged period, or after swimming, sweating or towelling off. Beware of health and wellbeing of elderly or persons with chronic medical conditions. If you know of them, call or visit them occasionally and check whether their household ventilation and air-conditioning devices function properly. Those more vulnerable to heat stroke should avoid outdoor activities and stay away from hot environment as far as possible. Stay in cool, well-ventilated or air-conditioned places.
本港受持續高溫天氣影響，市民應提高警惕，慎防中暑或因酷熱而引起不適，並需留意身體狀況。若出現頭暈、頭痛、噁心、氣促及神志不清等徵狀，應立刻休息和求助，並儘快求醫。
長者、孕婦、嬰兒及小童、慢性病如心臟病或高血壓患者，以及過胖人士均較易中暑，應及時觀察是否出現中暑徵兆。 在炎熱天氣下或高溫環境中工作的人士，請參照勞工處的預防工作時中暑指引，採取所需的防暑措施。 在戶外活動的人士，應多補充水分和不要過度勞累。於感覺不適時，應儘快到陰涼的地方休息。戶外活動宜安排在早上或下午較後的時間進行。 在室內活動時，亦應適時補充水分。如室內沒有空調設備，應儘量打開窗戶及以風扇保持空氣流通，亦可使用可供避暑的公共設施。 避免長時間在陽光下曝曬，以免受太陽紫外線曬傷。應穿上淺色和通爽衣服，配戴可遮掩後頸的闊邊帽子和能阻隔紫外線的太陽眼鏡。 最好選擇防曬系數（SPF）30或以上的廣譜及防水的防曬產品並大量塗抹，如需長時間在戶外逗留，或在游泳、流汗或以毛巾抹身後，謹記須每兩小時再次塗上防曬產品。 請關注長者或慢性病患者的健康狀況。如認識他們，請間中致電或探訪他們，並留意他們住所的通風及空氣調節設備是否運作正常。 較易中暑人士應儘量避免戶外活動，遠離高溫環境，到陰涼、通風或有空氣調節的地方。
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