A prolonged heatwave in South Korea has caused 13 deaths and 1,701 cases of heat-related illness since May 15, 2026 [1].

The extreme weather is creating a dual crisis by threatening public health and destabilizing the national agricultural sector. While power reserves remain stable, the scale of animal fatalities suggests a significant impact on food production chains.

Health officials said that seven deaths occurred this week alone [1]. The casualties include a 20-year-old man in Busan [2]. Despite the severity of the current wave, the number of illness cases is approximately 60 percent of the total seen during the same period last year [1], while deaths are about 70 percent of last year's figures [1].

The heat has been equally devastating for the livestock and aquaculture industries. Since mid-May, approximately 432,000 animals, including chickens and pigs, have died [1]. In the aquaculture sector, farmed fish losses have reached 157,000 [1].

"As the heatwave continues to rage day after day, patients with heat-related diseases and deaths are following one after another across the country," a YTN anchor said [1].

Infrastructure for cooling and electricity has held up under the pressure. The power supply reserve ratio is currently at 22 percent [1]. This suggests that while the biological toll is high, the electrical grid has not yet reached a critical failure point despite the increased demand for air conditioning.

Reporter Lee Hyun-jung said that the cumulative illness and death totals have climbed steadily since the mid-May onset of the heat [1]. Local authorities continue to monitor high-risk populations as temperatures remain elevated.

“1,701 cases of heat-related illness and 13 deaths since May 15”

The disparity between the high livestock mortality and the lower human casualty rate compared to the previous year suggests that while public health interventions may be improving, the agricultural sector remains highly vulnerable to climate volatility. The stability of the power grid prevents a total systemic collapse, but the massive loss of protein sources like poultry and fish could lead to short-term price inflation in South Korean markets.