Saddle Wind Ball | Storm surge hits 26 high-risk low-lying points in Hong Kong at a glance at Yuen Long city center

The quasi-typhoon "Ma Saddle" hits, the Observatory issued the No. 3 strong wind signal this afternoon (24th), and considers changing the No. 8 typhoon from 6:00 to 9:00 tonight.

The Observatory also warned that due to the storm surge and the astronomical high tide, the sea level of Quarry Bay will rise to about 3 meters above the datum level of the chart between 5:00 a.m. and 9:00 a.m. tomorrow (25th), which is 1 meter higher than normal. Left and right, rising sea water may cause flooding in low-lying areas.

Speaking of low-lying areas, one usually thinks of flooding hotspots such as Heng Fa Tsuen, Tai O and Lei Yue Mun. ─Feasibility Study", there are 26 high-risk residential areas in Hong Kong, in addition to Heng Fa Tsuen, South Horizons and Tai Po Sam Mun Tsai New Village located on the coast, as well as low-lying areas along the central and northwestern coasts of Yuen Long, etc. , including Yuen Long city centre.

▼26 low-lying or windy residential areas along the coast that are more likely to be affected by high risk in Hong Kong▼

▼October 13, 2021 Compass typhoon hit Tai O and flooded ▼

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If the water level of the Victoria Harbour rises to 3 meters or more from the datum level of the chart, there may be flooding in low-lying areas.

Storm surge is the phenomenon of sea level rise caused by the combined effect of low pressure and strong winds associated with tropical cyclones. The strong winds of tropical cyclones push seawater to the shore and build up high in coastal areas, which is the main cause of sea level rise.

When a storm surge occurs during an astronomical high tide, the total storm water level can rise to very high levels and can cause flooding in low-lying areas.

In general, if the total storm water level in Victoria Harbour rises to 3m or above the chart datum, flooding may occur in low-lying areas of Hong Kong.

▼On August 9, there was slight flooding in Sanjia Village, Liyumen▼

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▼August 9, 2022 Xinghua Village will be ready for Tropical Storm Mulan▼

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Observatory: The sea level in Quarry Bay will be 1m higher than normal from 5 to 9 a.m. on Thursday

According to the latest forecast of the Observatory, under the impact of the "Saddle", due to the impact of the storm surge and the astronomical high tide, the sea level of Quarry Bay will rise to about 3 meters above the datum level of the chart from 5:00 to 9:00 tomorrow morning, which is higher than The normal rise is about 1 meter, and the rising sea water may cause flooding in low-lying areas.

▼On October 9, 2021, the citizens of the tropical cyclone Lion Rock No. 8 typhoon were chasing the wind▼

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▼On the morning of October 13, 2021, the compasses came to Xinghua Village and turned the white-headed waves▼

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Research on Coastal Disaster Research by the Consultant of the China Earth Development and Development Administration after the super-powerful Taiwan Hato and Mangosteen

Hong Kong was hit by super typhoons Hato and Mangkhut in 2017 and 2018. Storm surges and waves caused serious damage to some coastal areas.

In 2019, the CERD commissioned a consultant to launch the "Coastal Hazard Study", which comprehensively reviewed the low-lying and windy locations along the coast of Hong Kong, and analyzed the impact of storm surges and waves on the relevant areas under extreme weather.

Three potential coastal risks include coastal seawater inundation, damage to coastal pavements and low-lying seawater inundation

The study analyzes the existing seawalls with potential coastal risks. Structurally, they are generally able to withstand extreme weather that occurs once in 100 years. However, considering the extreme weather conditions predicted by 2050, there are still three potential coastal risks, including "crossing the dike". "Waves" caused coastal seawater inundation and damage to coastal pavements, as well as seawater inundation in low-lying areas.

▼On October 13, 2021, under the typhoon signal No. 8, Li Yuemen was damaged by wind and rain▼

The results of the study targeted 26 low-lying coastal or typhoon residential areas in Hong Kong that were more likely to be affected by high potential risks, except for Hing Fa Village, South Horizons, Tai O, Lei Yue Mun (Ma Wan Village, San Ka Village), etc., as well as Kennedy Town, Sai Ying Pun and Sheung Wan, and the low-lying areas in the central part of Yuen Long, including (Tai Jing Wai, Chung Hau Fisherman's New Village, Shan Pui Village, Wang Chau, Yuen Long City Center); Low-lying areas along the northwest coast of Lang (Shaqiao Village, Hucao Village, Liufushan, Kengkou Village, Shangbaini, Xiabaini), etc.

▼26 low-lying or windy residential areas along the coast that are more likely to be affected by high risk in Hong Kong▼

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Kennedy Town, Sai Ying Pun and Sheung Wan

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Xinghua Village

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Shek O Village

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Stanley Eight

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South Horizons

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Tung Chung Bay (Ma Wan Chung Village, Sha Tsui Tau, Sha Lo Wan)

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Tai O

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Ten Long and Lower Cheung Sha Village, Lantau

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Mui Wo Ma Po Village and Chung Hau

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Western District of Peng Chau (Nam Wan New Village)

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Cheung Chau West

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Yung Shue Wan, Lamma Island

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Lei Yue Mun (Mahuan Village, Sanjia Village)

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Sha Tau Kok City (Zhongying Street, Gangxia)

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Western low-lying area of ​​Kat O (Kat O Fishermen Village)

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Tai Po Sam Mun Tsai New Village

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Tai Po Market (near Lam Tsuen River)

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To Tau Wan Village, Ma On Shan

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Saigon city center and opposite sea

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Sai Kung Nam Wai / Ring the Bell

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Tseung Kwan O South (Tseung Kwan O Waterfront Park)

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Low-lying areas in central Yuen Long (Tai Tsing Wai, Chung Hau Fisherman's New Village, Shan Pui Village, Wang Chau, Yuen Long City Centre)

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Low-lying areas along the northwest coast of Yuen Long (Sha Qiao Village, Hu Cao Village, Lau Fau Shan, Hang Hau Village, Shang Pak Nai, and Lower Pak Nai)

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Tai Lam Luen On New Village

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Tuen Mun Ka Wo Lane

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Shamjing New Village

Saddle Typhoon Signal | "Suddenly" Changed to Typhoon Signal No. 8?

There is a precedent for extremely fast intensification. This No. 10 wave is the most classic saddle typhoon | The Observatory expects to upgrade the typhoon 200 kilometers southwest of the port-grazing highland to blow the saddle typhoon | The Observatory says that the saddle moves quickly and the weather will change rapidly. The storm surge has a high risk of flooding. Announcement that the No. 3 typhoon signal will be reissued at noon, and the combination of three situations will increase the threat of saddle typhoon signal |