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 5 p.m., Tropical Storm Mitag was estimated to be about 410 kilometres east-southeast of Hong Kong (near 20.3 degrees north 117.5 degrees east) and is forecast to move northwest at about 18 kilometres per hour in the general direction of the coast of eastern Guangdong. According to the present forecast, under the combined effect of the northeast monsoon over southern China and Mitag, occasional strong winds will start to affect the offshore waters and high ground of Hong Kong tonight and at first tomorrow. However, the chance of sustained strong winds generally over the territory is relatively low. The Standby Signal, No. 1 will remain in force at least until 9 a.m. tomorrow morning. Mitag is expected to intensify gradually and edge closer to the coast of eastern Guangdong. Under the influence of the northeast monsoon, Mitag will then turn westwards, edging closer to the vicinity of the Pearl River Estuary. However, there are uncertainties in its landfall location and intensity. Depending on the intensity of Mitag, the distance of its persistent strong winds from Hong Kong and the change in local wind conditions, the Observatory will assess the need of issuing higher tropical cyclone warning signals during the day tomorrow. The outer rainbands of Mitag are affecting the coast of Guangdong. Showers are expected to increase gradually tomorrow. There will be occasional squally showers and thunderstorms on Saturday. Showers will be heavy at times. There will be swells. Members of the public are advised to stay away from the shoreline and not to engage in water sports. (Precautionary Announcements with No. 1 Signal) 1. Precautions should be taken. Drains should be cleared of obstructions, and windows and doors should be checked. 2. People in areas of exposed to high winds or in low-lying areas should take precautions against strong winds and flooding. 3. Those who have duties during a tropical cyclone should now remain on call. 4. Fishing vessels and low power vessels in open sea should seek shelter as soon as possible and be secured properly with moorings. 5. Construction and property management practitioners should make sure that overhanging facilities and temporary structures outdoors are securely fastened, and should take precautionary measures. 6. Listen to radio, watch TV or browse the Hong Kong Observatory's website and mobile app for the latest information on the tropical cyclone. Dispatched by Hong Kong Observatory at 16:45 HKT on 18.09.2025
Thunderstorm Warning issued at 12:35 p.m. on 18 Sep 2025 has been extended until 8:00 p.m. today. A few severe squally thunderstorms are expected to occur over Hong Kong. Intense gusts reaching 70 kilometres per hour or above may affect Hong Kong. Hail may affect Hong Kong shortly. Members of the public are advised to take the following precautions when thunderstorms occur: 1. Seek safe shelter as soon as possible 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. 4. Take precautions against intense gusts. Beware of flying debris and falling objects. 5. Drivers using highways and flyovers should reduce speed to be alert to intense gusts. Dispatched by Hong Kong Observatory at 17:00 HKT on 18.09.2025
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 06:45 HKT on 18.09.2025
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