Ongoing extreme heat across South Korea, driven by a strong high-pressure system and suppressed monsoon activity, underpins trader focus on 35–36°C for Incheon’s August 7 peak. Official Korea Meteorological Administration data show multiple sites exceeding 40°C in early August, with Seoul-area stations posting consecutive days above 34°C amid high humidity that limits nighttime cooling and favors daytime maxima. Ensemble forecasts cluster near 35–37°C, but small differences in cloud cover, sea-breeze timing from the Yellow Sea, or weak frontal passages could shift the daily high by 1–2°C. Historical August climatology for Incheon (average high ~29°C) places the current anomaly well above baseline, while model spread remains modest given the stable synoptic pattern, leaving the narrow 34–37°C band as the dominant market-implied range until the next high-resolution runs.