South Korean meteorologists issued an extreme rain forecast and landslide-risk alert for the central region of the country on Friday [1, 2].
The warnings come as a severe summer heat wave has intensified atmospheric moisture, creating conditions for sudden and heavy precipitation. These weather patterns increase the risk of flash floods and soil instability in mountainous areas.
Weather caster Lee Hye-min of YTN News said from Yeouido Hangang Park that the rain is expected to arrive in stages across the peninsula [1]. In Seoul, where temperatures reached close to 32 °C [1], rain is forecast to begin around 9 p.m. [1]. Southern Gyeonggi Province is expected to see the first arrivals of rain around 7 p.m. [1].
Rainfall estimates vary by region. Some reports indicate the central region could see a maximum of 300 mm [2]. Other forecasts provide more localized figures, estimating up to 60 mm for the Chungcheong and Yeongnam regions [1]. The Honam region is expected to receive up to 50 mm [1], while Jeju Island is forecast to see between five and 30 mm [1].
Local authorities have urged residents to remain vigilant as the "extreme rain" event unfolds overnight. The landslide-risk warning is particularly critical for areas with steep terrain where saturated soil may fail under the weight of heavy rainfall [1, 2].
During the broadcast, an anchor questioned when the rain would arrive in the capital, noting that Seoul still felt hot [1]. Lee said the timeline for the shifting weather patterns moving toward the city [1].
“The warnings come as a severe summer heat wave has intensified atmospheric moisture.”
The discrepancy in rainfall forecasts—ranging from 60 mm in some regions to 300 mm in the central highlands—highlights the volatile nature of the current monsoon season. The convergence of extreme heat and high humidity is creating 'water bombs' or localized extreme precipitation events, which challenge existing urban drainage systems and increase the lethality of landslides in rural provinces.
