The Korea Meteorological Administration expanded a severe heatwave warning nationwide on Monday after temperatures in some regions approached 40°C [1], [2].

This escalation marks a critical shift in the country's emergency response to extreme weather. The issuance of the ‘폭염중대경보’ (severe heatwave warning) is the first of its kind in South Korean history [2].

The extreme heat is concentrated in several areas, with Gyeongsan in the Gyeongbuk province recording temperatures that neared 40°C [2]. The meteorological agency said the heatwave expanded to cover most of the country as a result of persistent high temperatures and high humidity following the end of the rainy season [1], [2].

Officials said the combination of moisture and heat has caused a rapid increase in the perceived temperature. This atmospheric condition increases the risk of heat-related illnesses and places significant strain on the national power grid as cooling demands surge.

The nationwide expansion of the warning allows for more aggressive government intervention to protect public health [1]. Local authorities are monitoring vulnerable populations and implementing emergency cooling measures in urban centers to mitigate the impact of the record-breaking heat.

Meteorologists said the current weather pattern is characterized by a stagnant high-pressure system that traps heat and humidity across the peninsula. The agency continues to monitor the situation as the country faces an unprecedented level of summer heat [1].

“The issuance of the ‘폭염중대경보’ is the first of its kind in South Korean history.”

The implementation of a first-ever severe heatwave warning indicates that South Korea's previous meteorological alert systems were insufficient for the current climate reality. By elevating the alert to a nationwide 'severe' status, the government is signaling that extreme heat is no longer a localized or seasonal nuisance but a systemic national security risk requiring coordinated emergency management.