Hong Kong Observatory forecasts and ensemble model runs through mid-week point to daytime maxima clustered around 29–31°C on August 24, aligning with the market’s tight distribution among those outcomes. Persistent southwesterly flow from the northern South China Sea, combined with high sea-surface temperatures near 28°C, maintains elevated baseline heat and humidity, while variable cloud cover and scattered thunderstorms modulate peak solar insolation. Urban heat-island effects can add 1–2°C in dense districts, yet any earlier or stronger convective outbreaks would favor the lower end of the range. Recent model shifts in timing of easterly surges and monsoon-trough activity explain the narrow spread and modest probabilities for 32°C or higher. Updated HKO briefings and high-resolution guidance expected over the next 48 hours will likely refine these probabilities before resolution.