The Hong Kong government declared on Friday that severe weather conditions, including flooding and landslides, will persist until at least midnight local time.
Public transportation is disrupted, and local authorities said non-essential staff should remain indoors. Essential employees should stay at their current location or seek safe places.
The Chinese special administrative region saw the highest hourly rainfall since records began 140 years ago associated with remnants of Typhoon Haikui, with the highest-level alert lasting over 12 hours. Two people have died, and 102 were treated in hospital, including two in serious condition.