Persistent heat wave conditions across the Seoul-Incheon region, with official KMA heat wave emergency warnings in effect and model guidance showing limited overnight cooling, are driving the tight market clustering around 27–28°C lows for August 7. High daytime temperatures near 35–37°C combined with elevated humidity suppress radiative cooling under weak synoptic flow, while the urban heat island effect in the Seoul metro area further elevates minimum readings consistent with early-August climatology of 24–27°C. Traders appear focused on the absence of incoming fronts or increased cloud cover that could allow greater nocturnal temperature drops, with resolution hinging on the official morning low recorded between 3–9 AM local time. Updated short-range KMA and international model runs over the next 48 hours will refine this narrow range.