Hong Kong Observatory urges residents to stay alert to danger of river flooding after issuing red rainstorm warning for second time in 2 days

The Hong Kong Observatory has warned of serious flooding after issuing a red rainstorm warning on Friday evening, the second such alert in two days.

The red signal issued at 8.40pm was downgraded to amber, the lowest in the three-tier warning system, at 10pm. All rainstorm signals were cancelled at 11.45pm.

“Though the rainstorm warning has been cancelled, people should stay alert to the danger that may be brought about by river flooding,” the Observatory said.

After issuing the red warning earlier, the forecaster said downpours were particularly heavy in Ma On Shan, exceeding 100mm an hour.

In Sai Kung, Sha Tin and Tai Po districts hourly rainfall of at least 70mm was recorded.