Hong Kong Braces for Latest-Ever Extreme Heat as Typhoon Kampai Approaches
SingTao · 2 SOURCESabout 4 hours ago2 MIN
Summary
Hong Kong is bracing for record-breaking late-season heat as the Hong Kong Observatory confirmed that today (October 21) will mark the latest occurrence of a "very hot day" on record. The mercury is expected to climb to 33 degrees Celsius, shattering the previous benchmark set on October 19, 2024. The unseasonably warm weather is being amplified by the outer subsidence effects of Super Typhoon Kampai, which is tracking toward Taiwan and will push humidity levels down to a bone-dry 35 percent by Friday. Three New Territories districts are already experiencing extreme heat, with temperatures forecast to peak at 37 degrees in Sheung Shui this afternoon.
Key Points
- The Hong Kong Observatory predicts today will see temperatures between 26 and 33 degrees Celsius, making it the latest "very hot day" ever recorded in Hong Kong
- Sheung Shui is forecast to reach 37 degrees, while Tin Shui Wai and Shek Kong will hit 36 and 35 degrees respectively this afternoon at 2pm, all reaching "extreme heat" thresholds
- Tropical Cyclone Kampai will cross waters east of Luzon over the next one to two days before likely recuring northward over the East China Sea toward Taiwan
- Friday's (October 23) relative humidity will plummet to a minimum of 35 percent, with temperatures holding at 33 degrees under sunny and very dry conditions
- A fresh northeast monsoon will arrive early next week, bringing temperatures down to a range of 26 to 30 degrees and scattered showers by Tuesday
Why It Matters
The convergence of record-late heat with extremely low humidity creates heightened fire danger across Hong Kong's rural areas and country parks, where dry vegetation can ignite rapidly under these conditions. Beyond fire risks, the sudden weather shift from late-autumn warmth to cooler, showery conditions will affect public health, particularly for vulnerable groups such as the elderly, who face increased heat stress during unseasonably hot spells followed by rapid temperature drops .
The convergence of record-late heat with extremely low humidity creates heightened fire danger across Hong Kong's rural areas and country parks, where dry vegetation can ignite rapidly under these conditions. Beyond fire risks, the sudden weather shift from late-autumn warmth to cooler, showery conditions will affect public health, particularly for vulnerable groups such as the elderly, who face increased heat stress during unseasonably hot spells followed by rapid temperature drops .