This story has been made freely available as a public service to our readers. Please consider supporting SCMP’s journalism by subscribing.The Hong Kong Observatory issued an amber rainstorm warning at 6.15pm on Tuesday, signalling that more than 30mm (1.2 inches) of rain had fallen or was expected to fall across the city within an hour.The forecaster said downpours were likely to continue, with unsettled weather expected over the next few days.“Heavy showers and squally thunderstorms...