The Hong Kong Observatory issued the Amber Rainstorm Warning Signal at 7pm, meaning that heavy rain has fallen or is expected to fall generally over Hong Kong, exceeding 30 millimetres in an hour, and is likely to continue.
The Observatory said on its website that "intense gusts may continue to affect Hong Kong" and called on residents to seek safe shelter as soon as possible.
It also said showers are affecting the coast of Guangdong and a subtropical ridge is covering southeastern China.