Heavy Rain Expected to Impact Large Areas of Hong Kong in the Coming Hours – RTHK Reports

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Observatory: Hong Kong May Experience Heavy Rain in the Next Few hours

Hong Kong, August 19, 2025 – The Hong Kong Observatory has issued a warning that wide areas of Hong Kong may be affected by heavy rain in the next one or two hours.Residents are advised to take precautions.

What specific areas are identified as being at highest risk of urban flooding according to RTHK‘s coverage?

Current Weather Situation & Forecast

RTHK (Radio Television Hong Kong) is reporting that a notable period of heavy rainfall is expected to affect much of Hong Kong in the next few hours. The hong Kong Observatory (HKO) has issued a rainy weather warning, and conditions are predicted to worsen rapidly. This isn’t just a typical summer shower; forecasts indicate potentially disruptive downpours across multiple districts. Residents are urged to prepare for potential flooding, travel disruptions, and landslides.

Areas Most at Risk

The following areas are currently considered to be at highest risk based on RTHK’s coverage and HKO data:

Low-lying areas: Districts like North Point, Sham Shui Po, and Sheung Mun are especially vulnerable to urban flooding.

Coastal regions: Areas along the coastline, including Sai Kung and Stanley, could experience storm surges and increased wave activity.

Hillside communities: Residents in areas with steep slopes, such as The Peak and parts of Kowloon Hills, should be vigilant for potential landslides.

New Territories: The new Territories region, with its more rural terrain, is susceptible to both flooding and landslides.

Understanding the Rainfall Intensity

The HKO uses a rainfall intensity scale to categorize the severity of rainfall. Currently, many areas are experiencing “very Heavy Rain” – defined as rainfall exceeding 50mm per hour. This level of intensity can quickly overwhelm drainage systems and lead to localized flooding. The forecast suggests we could see periods of “Extraordinary Rain” (over 70mm/hour) in some areas, significantly increasing the risk. Rainfall warnings are updated frequently, so staying informed is crucial.

Potential Impacts & Disruptions

The anticipated heavy rain is highly likely to cause a range of disruptions:

1. Transportation: Expect delays and cancellations on public transport,including MTR,buses,and ferries. Roads may become impassable due to flooding.
2. School Closures: The Education Bureau may announce school closures depending on the severity of the weather. Check official announcements.
3. Business Operations: Businesses may choose to close or operate with reduced staff.
4. Emergency services: Emergency services will be stretched, so only call 999 in genuine emergencies.
5. Power Outages: Heavy rain and strong winds can lead to power outages in affected areas.

Preparing for the Heavy Rain: Practical Tips

Here’s how you can prepare for the severe weather and stay safe:

Stay Informed: Monitor RTHK broadcasts, the HKO website (https://www.hko.gov.hk/en/index.html), and social media channels for the latest updates.

Secure Lose Items: Bring in any outdoor furniture,potted plants,or other loose items that could be blown away by strong winds.

Clear Drains: Ensure drains around your home and workplace are clear of debris to prevent flooding.

Prepare an Emergency Kit: Include essentials like a flashlight, batteries, first-aid kit, non-perishable food, and water.

Charge Devices: fully charge your mobile phone and other essential electronic devices.

Avoid Low-Lying Areas: Stay away from low-lying areas prone to flooding.

Exercise Caution While Driving: If you must drive, reduce your speed, turn on your headlights, and avoid flooded roads.

Be Aware of Landslide Risks: If you live on a hillside, be vigilant for signs of landslides, such as cracks in the ground or unusual water flow.

Ancient Precedent: Typhoon Signal No. 10 & Rainfall Records

Hong Kong has experienced extreme rainfall events in the past. In 2018, Typhoon Mangkhut brought record-breaking rainfall and widespread damage. While the current situation isn’t expected to be as severe as Mangkhut, it serves as a reminder of the potential impact of extreme weather. The HKO maintains detailed records of historical rainfall data, which can be used to assess risk and improve preparedness. Understanding these past events helps inform current safety measures.

Resources & Further Data

Hong Kong Observatory (HKO): https://www.hko.gov.hk/en/index.html – Official weather forecasts and warnings.

RTHK News: [https://news[https://news