The Hong Kong Observatory issued an amber rainstorm warning signal on Saturday afternoon, the second in a week.The forecaster raised the signal at 4pm, which meant that heavy rain exceeding 30 millimetres in an hour had fallen or was expected to fall across the city.“There will be flooding in some low-lying and poorly drained areas,” the Observatory said.A thunderstorm warning had also been in force since 2.30pm and would likely remain until 6.30pm, it said.It also warned gusts reaching 70km/h …
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