A heat wave is expected to move from the southeastern Korean peninsula to the Seoul metropolitan area starting Monday, Aug. 3 [1].

This shift represents a critical change in regional weather patterns that could expose millions of residents in the capital region to dangerous temperatures. The movement of the heat wave is driven by a change in wind direction, moving the extreme temperatures from the east toward the west.

Meteorologists said that easterly winds are shifting the heat's momentum [1]. Previously, northwesterly winds along the edge of the North Pacific high-pressure system carried dry, hot air over the Yeongnam Alps in Yangsan [1]. This phenomenon contributed to temperatures exceeding 40°C in Yangsan over a period of five days [1].

Now, the wind direction is changing, which will push that heat toward the Seoul metropolitan area [1], [2]. Experts said this transition will initiate a new bout of extreme heat for the region.

The situation is further complicated by the approach of Typhoon Dolphin [1], [2]. The storm may intensify the current heat wave by preventing two existing heat domes from breaking [1], [2]. This atmospheric trapping can lead to prolonged periods of high temperature and humidity.

"From this week, it appears that the momentum of the heat wave will move from the east to the west of the Korean peninsula as easterly winds blow," a YTN anchor said [1].

Reporter Jang A-young of YTN said that the heat wave, which had heated the southeastern part of the peninsula to over 40°C, is changing direction [1]. Jang said the previous northwesterly winds had pulled in drier and hotter air after crossing the Yeongnam Alps [1].

“the momentum of the heat wave will move from the east to the west of the Korean peninsula”

The convergence of a shifting wind pattern and the presence of Typhoon Dolphin creates a 'blocking' effect. By preventing heat domes from dissipating, the atmospheric conditions are likely to trap high temperatures over the Seoul metropolitan area, increasing the risk of heat-related illnesses and straining the city's energy infrastructure.