Ongoing heatwave conditions across the Korean Peninsula, driven by a strong high-pressure system and minimal cloud cover, represent the chief catalyst keeping trader focus on the 34–36 °C range for the Incheon station maximum on August 6. Recent Korea Meteorological Administration model runs and international guidance project afternoon peaks near 35 °C under light easterly flow, elevated humidity that curbs nocturnal cooling, and negligible precipitation risk, consistent with observed 34–39 °C readings earlier in the week. Subtle differences among leading outcomes hinge on the precise timing of peak solar heating versus any late-day sea-breeze moderation or thin high cloud, factors that can shift the daily maximum by 1–2 °C. Historical early-August analogs and current ensemble spread support the narrow market clustering while underscoring remaining forecast uncertainty ahead of the final 24-hour updates.