The Hong Kong Observatory has issued the amber rainstorm warning and urged residents to brace for widespread heavy rain and potential flooding under the influence of a broad trough of low pressure. The signal, sent out at 9.50am, was the second amber rainstorm warning to be issued on Friday. An earlier alert went out just after midnight and was cancelled at 2.15am. The Observatory urged residents to take all necessary precautions to reduce their exposure to risks posed by the heavy rain and...