Ongoing heatwave conditions driven by a persistent subtropical high-pressure ridge over the Korean Peninsula, combined with clear skies and light winds, underpin the tight clustering of market odds around 36–38°C for Busan’s August 2 maximum. Korea Meteorological Administration short-range guidance and ensemble model consensus indicate daytime peaks near 35–37°C, with coastal sea-breeze moderation and modest humidity limiting outliers above 38°C while preventing a drop below 36°C. Recent heatwave emergency warnings for Busan and surrounding areas, extending into early August, reflect sustained warm advection and strong insolation that have already produced comparable readings this week. Minor forecast shifts in cloud cover or wind direction ahead of the 24-hour window remain the key variables that could nudge the outcome between the leading bins.