Overview

• The Hong Kong Observatory recorded 358.8 mm of rain on August 5, the highest daily total for the month since records began in 1884.
• The black rainstorm warning remained in force for 11 hours and 15 minutes, making it the second-longest on record.
• The Drainage Services Department confirmed at least 25 flooding incidents, including submerged parking facilities and inundated staircases.
• Schools, courts and non-emergency hospital services were suspended as floodwaters disrupted key infrastructure.
• Meteorologists linked the extreme downpour to a low-pressure trough interacting with the southwest monsoon, a pattern intensifying with climate change.