Hong Kong Observatory Cancels Amber Rainstorm Warning After Two-Hour Alert
HK01 · 6 SOURCESabout 3 hours ago2 MIN
Summary
The Hong Kong Observatory issued an Amber Rainstorm Warning Signal at 8:20 PM on Sunday evening, October 4, 2026, after forecasting heavy rain affecting Hong Kong's widespread areas. The warning remained in effect for over two hours before being cancelled at 10:30 PM, though a thunderstorm warning continues to be in force. A cold front originating from Guangdong's inland areas moved southward toward the coast, bringing associated showers and thunderstorms that impacted the Pearl River Estuary region, with some areas experiencing particularly heavy rainfall. The Drainage Services Department has urged citizens to report street flooding through its 24-hour hotline. Looking ahead, temperatures are forecast to drop significantly this week, with the mercury expected to fall by up to 8 degrees Celsius overnight from Monday to Tuesday.
Key Points
- The Amber Rainstorm Warning was issued at 8:20 PM on Sunday and cancelled at 10:30 PM, remaining in effect for over two hours .
- A cold front forming over inland Guangdong moved southward and is expected to cross the coastal areas tonight, bringing moderate to fresh northerly winds and localized heavy showers with thunderstorms .
- The Drainage Services Department has activated its 24-hour flooding hotline at 23001110, urging citizens to report street flooding promptly .
- Temperatures are forecast to drop significantly, with Monday's high of 31 degrees Celsius falling to 24 degrees by Tuesday morning—a decrease of 8 degrees overnight .
- Urban areas will see Tuesday and Wednesday morning lows around 23 degrees Celsius, while the New Territories will be 2-3 degrees cooler; Tseung Kwan O and Lau Fu Shan are expected to reach 22 degrees .
Why It Matters
The Amber Rainstorm Warning, though short-lived, underscores Hong Kong's vulnerability to sudden weather changes as autumn approaches. The arrival of the cold front signals a transition to cooler weather, with morning temperatures dropping to levels that may affect vulnerable populations and require adjustments in daily routines. Residents in low-lying areas must remain vigilant about potential river flooding even after the warning is lifted, as accumulated rainwater continues to pose risks .
The Amber Rainstorm Warning, though short-lived, underscores Hong Kong's vulnerability to sudden weather changes as autumn approaches. The arrival of the cold front signals a transition to cooler weather, with morning temperatures dropping to levels that may affect vulnerable populations and require adjustments in daily routines. Residents in low-lying areas must remain vigilant about potential river flooding even after the warning is lifted, as accumulated rainwater continues to pose risks .