There are three rainstorm warnings in Hong Kong to denote especially heavy or hazardous rain.
Amber warning
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Heavy rain of 30mm an hour or above is falling and expected to continue. People are advised to take extra precautions.
Red warning
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Heavy rain of 50mm hours or above is falling and expected to continue. If a red signal is raised before school starts, children are expected to stay at home.
Black warning
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Heavy rain of 70mm an hour or above is falling and expected to continue, most likely resulting in flooding. People should not move from where they are. If a black rainstorm signal is raised in the morning, school is suspended and employees are not expected to go to work until it is lowered.
