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The Hong Kong Observatory issued an amber rainstorm warning at lunchtime on Wednesday before cancelling it later in the afternoon.
“A trough of low pressure is bringing showers and thunderstorms to the vicinity of the Pearl River Estuary persistently,” the forecaster said when it issued the signal.
“Locally, around 10mm of rainfall was recorded over many places this morning, and rainfall even exceeded 30mm over parts of New Territories West and Lantau Island.”
An amber rainstorm warning means heavy rain exceeding 30mm has fallen or is expected to fall in an hour. The last such signal was issued on April 25.
The Observatory previously said rainfall was likely to be particularly heavy in the Tsuen Wan area, potentially causing serious flooding.
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