A heat wave is gripping the Korean Peninsula, with the high on the 13th expected to soar to 37 C. Some areas will see showers, and the added humidity will keep the heat feeling like being trapped in a sauna.
According to the Korea Meteorological Administration on the 12th, the high on the 13th is forecast at 30 C to 37 C. This is because the North Pacific high and the Tibetan high are wrapping the peninsula in a double layer. In southern North Gyeongsang, the heat will intensify due to the "foehn effect," as southerly winds cross mountains and become hot and dry.
Some areas will have showers. Expected rainfall from the showers is 5–20 mm in Gangwon, Daejeon, Sejong, South Chungcheong, North Chungcheong and North Jeolla, and 5–40 mm in Seoul, Incheon and Gyeonggi. Rain may briefly lower temperatures, but after it stops, strong sunshine will heat the ground, raising humidity and extending the sweltering heat.
Tropical nights (overnight lows of 25 C or higher), when sweat runs down your back even at night, will also set in in earnest. If heat accumulated in the body from the heat wave and tropical nights is not relieved, heat-related illness can occur. Older adults and children should take special care.