Hong Kong Hit by Record Black Rainstorm: Flights Delayed, Services Disrupted

Hong Kong Hit by Record Black Rainstorm: Flights Delayed, Services Disrupted

Hong Kong experienced unprecedented rainfall as the Hong Kong Observatory issued a black rainstorm signal twice within six hours on August 5, 2025. Torrential downpours triggered widespread disruptions across the city, impacting public services and leading to class suspensions.

Rainstorm Details

The highest-level rainstorm warning was initially declared at 11:45 pm on Monday and reissued at 5:50 am on Tuesday. The duration of Tuesday's black rainstorm warning, lasting 11 hours and 15 minutes (from 5:50 am to 5:05 pm), marked it as the second-longest in Hong Kong's recorded history.

Impact on the City

The heavy rains brought Hong Kong's financial district to a standstill, prompting the closure of schools and the activation of temporary shelters. Hospital services also faced challenges. Significant travel disruptions occurred, with 101 flights delayed and two canceled, according to reports from the South China Morning Post. Authorities warned of potential "severe flooding," noting that hourly rainfall had already exceeded or was expected to surpass 100 millimetres in certain areas. The black signal is activated when rainfall exceeds 70 millimetres within an hour.

Specific Incidents

Social media imagery revealed cars partially submerged in an outdoor parking lot in Tseung Kwan O. Public transport experienced substantial slowdowns in various locations, leading to the closure of some subway station exits. Emergency room services at Queen Mary Hospital were affected due to severe flooding in the surrounding area.