The Centre for Health Protection (CHP) of the Department of Health on September 28 reminded the public to guard against heat-related illnesses, including heat cramps, heat exhaustion and heat stroke, during very hot weather. It advised timely hydration, light-coloured and loose-fitting clothing, well-ventilated indoor spaces, and avoiding strenuous exercise or prolonged activities such as hiking. Where possible, outdoor activities should be scheduled for the morning or late afternoon, with enough water brought along, and caffeine-containing and alcoholic drinks avoided since they may speed up water loss.

The CHP said infants and young 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 urged close attention to health indicators in these groups, adequate supplies of usual medication, and keeping in contact with family, neighbours and the community. Outdoor and manual workers were advised to reschedule work to cooler hours where feasible, provide shade and ventilation equipment, and take breaks.

According to the DH, over the past five years Hong Kong has recorded more than 200 hospital admissions due to heat stroke each year, with two to five fatal cases mainly during May to September. Symptoms include dizziness, headache, nausea, shortness of breath or confusion. The CHP also advised watching the latest weather and ultraviolet index, and when the UV index is 6 or above, using sunscreen of at least SPF 30, seeking shade, and wearing protective clothing, sunglasses and a hat.