Rainstorm Warning System The rainy season in Hong Kong is normally between April and September. Rain could be particularly heavy and persistent during May and June, causing severe traffic disruption and on occasions major floods and landslips resulting in casualties. The rainstorm warning system is designed to alert the public about the occurrence of heavy rain which is likely to bring about.
The rainstorm warning signals are a set of signals used in Hong Kong to inform the public of heavy rainfall that is likely to cause major disruptions, such as traffic congestion and flooding. These warnings also help ensure that essential services are prepared to respond to potential emergencies. [1] The Hong Kong Observatory is responsible for issuing these signals, which are broadcast on.
Learn about Hong Kong's Rainstorm Warning System, including the Amber, Red, and Black signals, to stay safe and informed during the rainy season. Find out what each warning level means and how to respond appropriately. While Amber warning signal according to the Hong Kong Observatory means that heavy rain has fallen or is expected to fall to the tune of 30mm or more in an hour.
HONG KONG - The Hong Kong Observatory issued its most severe "black rainstorm warning" for the fourth time in eight days, an event not seen before in the city's modern history. Rainfall reached over 355 millimetres, the most ever recorded in a single day in 141 years. Roads turned into fast-flowing streams, stairways became cascading torrents, and many public services were forced to.
The Red Rainstorm Warning Signal will be issued when heavy rain has fallen or is expected to fall generally over Hong Kong, exceeding 50 millimetres in an hour, and is likely to continue. It means that the heavy rain could cause serious road flooding, and people who have to travel should carefully consider the weather and road conditions. Hong Kong recently experienced an extraordinary weather event-three black rainstorm warnings in just four days, causing severe flooding, landslides, and widespread disruptions.
The Hong Kong Observatory (HKO) described this as an unprecedented phenomenon, raising questions about climate change and extreme weather patterns. The Hong Kong Observatory issued the highest-level black rainstorm warning for a second time in a week on Saturday, with torrential downpours causing flooding in some areas of the city. Heavy rain will bring flash floods, and flooding is occurring or is expected to occur in watercourses, the Hong Kong Observatory warned on Tuesday morning.
This means that heavy rain has fallen or is expected to fall generally over Hong Kong, exceeding 70 millimetres in an hour, and is likely to continue," the forecaster said.