The Centre for Health Protection (CHP) of the Department of Health reminded the public on September 12 to take precautions against heat-related illnesses, including heat cramps, heat exhaustion and heat stroke, during very hot weather. It advised timely hydration, light-coloured and breathable clothing, well-ventilated indoor spaces, avoiding strenuous exercise and prolonged activities such as hiking, and scheduling outdoor activity in the morning or late afternoon. It also advised against caffeine and alcohol, which may speed water loss.

The CHP said infants and children, the elderly, pregnant women, people with chronic illnesses such as heart disease or high blood pressure, overweight people and outdoor or manual workers are more susceptible to heat stroke. It said young children should never be left unattended in a confined space such as a vehicle, and advised at-risk groups to monitor health indicators and keep in contact with family, neighbours and the community. Outdoor and manual workers were advised to reschedule work to cooler hours where feasible.

According to the CHP, Hong Kong has recorded over 200 hospital admissions due to heat stroke each year over the past five years, with two to five fatal cases occurring mainly from May to September. Symptoms listed include dizziness, headache, nausea, shortness of breath and confusion. The CHP also advised following precautions when the UV index is 6 or above, including sunscreen of at least SPF 30, reapplied every two hours when outdoors for long periods or after swimming, sweating or towelling off.