Overview

• More than 350 mm of rain fell by 2 pm on August 5, marking the heaviest August daily total since records began in 1884.
• The Hong Kong Observatory issued its highest-level rainstorm signal twice within six hours and held the black warning for 11 hours and 15 minutes, the second-longest on record.
• This was the fourth black rainstorm warning in eight days, breaking the city’s annual frequency record for its top weather alert.
• Authorities suspended all classes and opened temporary shelters after hourly rainfall exceeded 100 mm in some districts.
• Over 100 flights were delayed or canceled as flooded roads and inundated transport routes slowed services across the territory.