UN 
On Saturday afternoon, Seoul’s digital billboards flashed 39.3°C, marking the city’s highest recorded temperature as South Korea experienced its hottest day ever. Emergency services responded to dozens of heatstroke cases around Gwanghwamun Square, while local authorities distributed water and set up cooling tents for residents and tourists. The Korea Meteorological Administration officially confirmed the new national record late Saturday, attributing the event to prolonged heatwaves gripping East Asia this summer.
This extreme heat aligns with global weather disruptions observed this season, including wildfires in Greece and flooding in central China. Data from the World Meteorological Organization indicates that July and early August have seen temperature highs in over 20 countries, underscoring the urgency of SDG 13 (Climate Action). South Korea’s Ministry of Environment called for accelerated adaptation measures, including expanding green infrastructure in urban centers and revising heat emergency protocols before the end of summer 2026.
Despite President Kim Jae-hyun’s climate adaptation pledges last spring, critics point to slow progress on urban cooling initiatives and delayed implementation of the National Climate Resilience Plan. Less than 25% of the plan’s targeted green roofing projects had been completed as of this week, according to a Seoul Metropolitan Government report released Friday.
The Korea Disease Control and Prevention Agency (KDCA) reported a 35% increase in heat-related hospitalizations compared to the same period last summer. Nighttime temperatures remained above 28°C for five consecutive days, straining local electricity grids as demand for air conditioning surged. Seoul’s city council is expected to convene an emergency session on Tuesday to review resource allocation for heat mitigation and public health services.
With the summer peak underway, policymakers and sustainability professionals in South Korea face mounting pressure to deliver on climate adaptation commitments, as the nation’s record temperatures serve as a stark warning of escalating climate risks in 2026.
Frequently Asked Questions
What was the highest temperature ever recorded in Seoul?
Seoul recorded its highest-ever temperature at 39.3°C on Saturday afternoon.
How much have heat-related hospitalizations increased in South Korea compared to last summer?
Heat-related hospitalizations increased by 35% compared to the same period last summer, according to the Korea Disease Control and Prevention Agency (KDCA).
How much progress has been made on Seoul’s green roofing projects under the National Climate Resilience Plan?
Less than 25% of the targeted green roofing projects in Seoul’s National Climate Resilience Plan have been completed as of this week.
How long did nighttime temperatures in Seoul stay above 28°C during the heatwave?
Nighttime temperatures stayed above 28°C for five consecutive days in Seoul.
What emergency measures did Seoul implement during the record heatwave?
Local authorities distributed water, set up cooling tents for residents and tourists, and emergency services responded to dozens of heatstroke cases around Gwanghwamun Square.
