Hong Kong Races to Overhaul Heat-Stress Warning System After Record Temperatures
SCMP · 1 SOURCESabout 3 hours ago2 MIN
Summary
Hong Kong's labour minister Chris Sun Yuk-han announced on Tuesday that authorities aim to complete a revamp of the city's heat-stress warning system by the end of August . The Labour Department faced criticism after its warning system remained at the lowest level despite record-breaking temperatures of 36.9°C on August 9, the highest since records began in 1884 . Former Observatory director Lam Chiu-ying had described the heat index used by the warning system as a wrong parameter that gave insufficient weight to solar heating .
Key Points
- Labour Secretary Chris Sun Yuk-han said authorities are coordinating with the Labour Department and Hong Kong Observatory to complete system optimization by August 31
- The August 9 temperature of 36.9°C marked Hong Kong's highest recorded temperature since 1884, yet the heat-stress warning stayed at its lowest level
- Former Observatory director Lam Chiu-ying criticized the current Heat Index formula for being designed for general residents rather than outdoor workers
- Commissioner for Labour Sam Hui Chark-shum stated the department is lowering activation thresholds for temperature and solar radiation
- The Heat Index formula comprises air temperature, wet-bulb temperature reflecting humidity and wind speed, and globe temperature measuring solar heating effects
Why It Matters
These changes will directly affect outdoor workers across construction, delivery, and security sectors who face extreme heat exposure daily . With climate change driving increasingly severe temperatures, an effective warning system is essential for preventing heatstroke and protecting public health .
These changes will directly affect outdoor workers across construction, delivery, and security sectors who face extreme heat exposure daily . With climate change driving increasingly severe temperatures, an effective warning system is essential for preventing heatstroke and protecting public health .