This means that heavy rain has fallen or is expected to fall generally over Hong Kong, exceeding 70 millimeters in an hour, and is likely to continue.

The Observatory advised citizens to take shelter in a safe place and stay there due to seriously flooded roads and inclement weather conditions.

Parents, students, school authorities and school-bus drivers should listen to radio or television announcements on schools. Do not attempt to travel until the Black Rainstorm Warning Signal is no longer in force and traffic conditions have improved.

Students of PM schools do not have to attend school this afternoon. Schools should keep their premises open and implement contingency measures to look after arriving students. Schools which are in session should continue until the end of school hours. They should ensure that conditions are safe before allowing students to return home.

People who have to travel should carefully consider the weather and road conditions and take necessary precautions.

Heavy rain will bring flash floods, and flooding is occurring or is expected to occur in watercourses. People should stay away from watercourses.

Residents living in close proximity to rivers should stay alert to weather conditions and should consider evacuation if their homes may become flooded.