Hong Kong rainstorm warning signals

Very heavy rain has fallen or is expected to fall generally over Hong Kong, exceeding 70 millimetres in an hour, and is likely to continue.

Buses and other forms of public transport may be halted after a while to allow commuters to go home, depending on demand and the level of risk along the route.

The RED and BLACK signals warn the public of heavy rain which is likely to bring about serious road flooding and traffic congestion.

Both heavy rain and thunderstorm warnings were issued to the public through press release, radio broadcast and telephone calling service to subscribers.

[6][7] The amber signal were the first stage of the warning system based on forecast of heavy rainstorms, and were used to alert government departments and major public transport and utility services.

The red and black signals were the second stage of the warning system based on actual rainfall levels recorded, and were issued to the public.