Korea Heatwave Safety: Warning Signs and What Visitors Should Do

South Korea's summer heat can become a health risk during long outdoor days, especially at exposed palaces, hiking routes, festivals, or transport queues. Korea's Disease Control and Prevention Agency (KDCA) said hotter-than-normal conditions could continue through the end of August 2026 and advises regular water, shade, and rest.

KDCA's emergency-room surveillance recorded 1,399 heat-illness cases and eight deaths from May 15 through July 26, 2026. That is a dated surveillance count, not a live total, but it shows why current heat alerts matter. Older adults, children, pregnant people, outdoor workers, people with disabilities, and people with underlying conditions may face greater risk.

Warning signs

Heat illness may include headache, dizziness, cramps, unusual fatigue, nausea, heavy sweating, fainting, or reduced consciousness. For suspected heat exhaustion, move the person to air conditioning or shade, loosen clothing, and allow rest. A fully conscious person may take water slowly. Seek medical care if symptoms continue or recovery is uncertain.

Plan a safer hot day

• Check weather and heat alerts before leaving.
• Carry water and drink regularly rather than waiting for thirst.
• Schedule exposed attractions earlier or later and use air-conditioned stops.
• Wear light, loose clothing and use a hat or sun umbrella.
• Reduce activity if temperatures rise suddenly or you feel unwell.
• If a medical condition affects fluid intake, follow your clinician's advice.