Tropical Cyclone Warning Bulletin Here is the latest Tropical Cyclone Warning Bulletin issued by the Hong Kong Observatory. The Standby Signal, No. 1 is in force. This means that a tropical cyclone now centred within about 800 kilometres of Hong Kong may affect us. At 3 a.m., the tropical depression over the central part of the South China Sea was estimated to be about 770 kilometres south of Hong Kong (near 15.4 degrees north 113.6 degrees east) and is forecast to move west-northwest at about 10 kilometres per hour across the central part of the South China Sea. Dispatched by Hong Kong Observatory at 02:45 HKT on 11.06.2025
Thunderstorm Warning was issued at 2:25 a.m. on 11 Jun 2025. It will be valid until 4:30 a.m. today. Isolated thunderstorms are expected to occur over New Territories North. Members of the public are advised to take the following precautions when thunderstorms occur: 1. Seek safe shelter if you are staying outdoors. 2. Leave the water. Do not swim outdoors or engage in other outdoor water sports. 3. Do not stand on high grounds. Keep away from highly conductive objects, trees or masts. Dispatched by Hong Kong Observatory at 02:25 HKT on 11.06.2025
The Very Hot Weather Warning is now in force. 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. Dispatched by Hong Kong Observatory at 16:20 HKT on 10.06.2025
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