On August 18, 2026, southern regions of South Korea, including Busan and Gyeongnam, are bracing for a combination of heavy rain and oppressive heat, following a series of severe weather events.
Why it matters: This unusual weather pattern poses risks for residents recovering from recent heavy rainfall. The combination of high temperatures and humidity can increase the likelihood of heat-related illnesses.
- Heavy rain is forecasted to continue in southern coastal areas until midday, with localized thunderstorms expected in the afternoon.
- Temperatures are predicted to rise significantly, reaching highs of 33°C in Yangsan and Hamyang, and around 31°C in Busan and Tongyeong.
- Residents are advised to stay vigilant due to the potential for flash floods and landslides in areas already saturated from previous rains.
Driving the news: The Korea Meteorological Administration (KMA) reported that as of 8:30 AM on August 18, rain was falling in various locations along the southern coast, particularly in Busan, Changwon, and Yeosu. The KMA emphasized that the unstable atmospheric conditions could lead to severe thunderstorms.
- Forecasted rainfall amounts include 10-60 mm along the southern coast and 5-30 mm in inland areas of Gyeongnam and Ulsan.
- Thunderstorms may bring strong winds, lightning, and heavy rain, prompting warnings for outdoor activities.
- The warmest temperatures are expected in the afternoon, exacerbating the discomfort caused by high humidity levels.
State of play: Following the heavy rains, the ground remains unstable, increasing the risk of landslides and debris flows, especially in hilly areas and near riverbanks. The public is urged to take precautions.
- Morning low temperatures were relatively high, with readings of 25°C in Busan and between 21-25°C across Gyeongnam.
- As the day progresses, the perceived temperature could feel even hotter, peaking around 33°C due to humidity.
- Areas previously affected by flooding need to remain cautious, as additional rain could lead to renewed flooding risks.
The big picture: The unusual weather is part of a broader trend affecting southern Korea, where extreme weather events have become more frequent. The combination of heavy rainfall and heat waves creates a challenging environment for residents.
- Experts warn that climate change may be contributing to the increased frequency and intensity of such weather patterns.
- Authorities are monitoring conditions closely and are prepared to respond to any emergencies that may arise from this weather.
- Public health officials are advising vulnerable populations, including the elderly and those with pre-existing health conditions, to limit outdoor activities during peak heat hours.
What they're saying: Local officials and meteorologists are emphasizing the need for public awareness and preparedness as the region faces these dual threats of rain and heat.
- "The situation is serious. We need everyone to stay informed and take necessary precautions," said a spokesperson from the KMA.
- Health officials recommend staying hydrated and avoiding strenuous outdoor activities during the hottest parts of the day.
- Residents should also prepare for potential power outages due to increased electricity demand from air conditioning units.
By the numbers: Current forecasts indicate the following expected rainfall and temperatures:
- Rainfall expected on August 18: 10-60 mm in Busan and Gyeongnam, 5-30 mm in Ulsan and inland Gyeongnam.
- High temperatures on August 18: Busan 31°C, Ulsan 33°C, and inland Gyeongnam 30-33°C.
- Low temperatures: Morning lows of 25°C in Busan, 24°C in Ulsan, and 22-25°C in Gyeongnam.
What's next: The weather pattern is expected to persist over the coming days, with additional thunderstorms and high temperatures continuing to pose risks.
- Forecasts for August 19 suggest similar conditions, with thunderstorms likely and temperatures remaining high.
- Residents should prepare for potential emergency alerts and stay updated on weather advisories from the KMA.
- As the heat wave continues, public health campaigns will focus on preventing heat-related illnesses.
Authorities are urging everyone to remain vigilant and proactive in safeguarding their health and property as they navigate this challenging weather situation.