The Hong Kong Observatory issued the Black Rainstorm Warning signal at 11.05pm on Thursday, warning that heavy rain – exceeding 70 millimetres an hour – has fallen or is expected to fall generally over Hong Kong.

It's the first black rainstorm warning in two years, and the forecaster said flooding could be very serious in certain areas.

"Because of seriously flooded roads and inclement weather conditions, you are advised to take shelter in a safe place and stay there," the Observatory said.

"Heavy rain will bring flash floods, and flooding is occurring or is expected to occur in watercourses. People should stay away from watercourses. Residents living in close proximity to rivers should stay alert to weather conditions and should consider evacuation if their homes may become flooded."

The sudden downpours caused flash flooding across the city, with areas like Chai Wan, Tseung Kwan O, Tai Po, Fanling and Sheung Shui being the worst affected.

MTR services were badly affected by the rain, with the rail operator suspending services from Whampoa Station to Kwun Tong station due to flooding at Wong Tai Sin.

The company said recovery work is underway, adding that it will give an update later.

Citybus and KMB, meanwhile, said they are suspending all overnight service due to the inclement weather, and urged passengers who plan to take the bus in the morning to
look out for the latest announcements on their app or website.
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Last updated: 2023-09-08 HKT 01:57