South Korea has reissued nationwide heat-wave warnings after Cheongju recorded its second tropical night of the year on July 1 [1].
This weather pattern signals a dangerous intersection of high humidity and heat during the monsoon season, increasing the risk of heat-related illness for residents across the peninsula.
In Cheongju, located in Chungbuk Province, the overnight low temperature reached 25 °C [1]. This marks the second time a tropical night has been recorded this year, following an earlier instance in Gangneung on May 30 [1].
Meteorologists said the current conditions are driven by warm, humid air entering the region from the southwest [2]. Thick cloud cover has further trapped heat, which prevented nighttime temperatures from dropping [2].
Authorities issued warnings for areas where perceived temperatures are expected to reach 33 °C or higher [1]. While the southern region of the country faces intensifying heat, the central region is expected to see increasing rain [1].
"In the midst of the rainy season, the second tropical night of the year was recorded in Cheongju today, and heat-wave warnings have been issued again across the country," said a YTN anchor [1].
Reporter Kim Min-kyung said that the intense heat and nighttime warmth would persist, particularly in the regions under official warnings [1].
“Cheongju recorded its second tropical night of the year on July 1”
The occurrence of 'tropical nights' during the monsoon season suggests a compounding effect where high humidity prevents the environment from cooling down overnight. This creates a cycle of continuous heat stress for the population, as the body cannot recover from daytime temperatures during sleep, potentially increasing the burden on public health systems.
