# US Weather Alert: Capital Area Braces for 300mm Rain This Weekend – Ground Already Unstable, Extreme Caution Advised
SEOUL, July 17 (Reuters) – The Korea Meteorological Administration (KMA) issued a severe weather warning Friday. Up to 300mm of rain is forecast for the Seoul capital area and central regions this weekend. The ground is already saturated from previous storms.
This is expected to be “the heaviest rain of the summer,” according to KMA officials. The risk of flooding and landslides is exceptionally high.
1. Heavy Rain Forecast: Up to 300mm Expected in Capital Area
Rainfall totals for Saturday and Sunday are projected at 100–200mm for Seoul, Gyeonggi Province, and Gangwon Province. Some areas could see over 300mm. The Chungcheong region is expected to receive 80–150mm.
The heaviest downpours are predicted for early Saturday morning and overnight into Sunday. Hourly intensity could reach 50–80mm. This may trigger emergency disaster text alerts.
| Region | Forecast Rainfall (mm) | Heaviest Period |
|---|---|---|
| Seoul Capital Area | 100–200 (up to 300+) | Early Sat / Sat night |
| Gangwon | 100–200 (up to 300+) | Early Sat / Sat night |
| Chungcheong | 80–150 (up to 250+) | Sat night–Sun dawn |
| Jeolla | 30–80 (up to 100+) | Sunday |
| Gyeongsang | 50–100 (up to 150+) | Sunday |
| Jeju Island | 5–30 | Sunday |
2. Why the Ground Is Already Loosened and More Dangerous
July 2026 has already seen multiple rain events. Soil saturation is high. Ground stability is weakened.
Last August, Gwangju experienced severe flooding after similar conditions. The risk is compounded. Loosened ground increases the likelihood of landslides, sinkholes, and rapid surface runoff. Urban and mountainous areas near Seoul are particularly vulnerable.
“The ground is already soft,” said a KMA official. “Even moderate rain could trigger incidents.”
3. Safety Measures and Preparedness Tips for Residents
Residents in affected areas should avoid outdoor activities during peak rain times. Secure loose objects. Prepare emergency kits. Monitor local alerts.
Specific vulnerable zones include low-lying roads, parks, and downtown areas. Gwangnaru Hangang Park swimming area was crowded earlier this week. It is now at risk. Gwanghwamun may experience sudden flooding.
Check for sinkholes on roads and near construction sites. Report any damage immediately.
4. Government and Emergency Response Activation
The Central Disaster and Safety Countermeasures Headquarters (Jungdaebon) has been activated. Local authorities are coordinating.
Emergency text messages will be sent out as needed. The KMA is providing real-time updates. Residents should report flood or landslide damage to local disaster centers. Seek shelter in designated evacuation sites.
5. Broader Impact: Weekend Plans and Travel Disruptions
This weekend includes the Constitution Day holiday. Outdoor activity and travel are typically high. Public events may be canceled or postponed.
Transportation disruptions are expected. Roads, subways, and flights may be affected. Han River parks are popular destinations. They are now danger zones. Earlier photo reports showed crowded swimming areas. The situation has reversed.
Reconsider any outdoor plans. Stay indoors during peak rainfall.
6. Long-Term Outlook and Climate Considerations
Extreme rainfall events are becoming more frequent on the Korean Peninsula. Climate trends indicate this pattern will continue.
Infrastructure resilience must improve. Public awareness is critical. Follow official channels for updates. Prepare for potential follow-up storms.
The warning is clear: up to 300mm of rain, weakened ground, and high risk of flooding and landslides. Vigilance is essential. Avoid unnecessary travel. Monitor the KMA and local authorities.
💡 Frequently Asked Questions (FAQ)
- Q: How much rain is forecast for the Seoul capital area this weekend?
- A: Rainfall totals of 100–200mm are expected, with some areas seeing over 300mm. The heaviest downpours are predicted for early Saturday morning and overnight into Sunday.
- Q: Why is the ground considered dangerous?
- A: The ground is already saturated from previous storms in July 2026, weakening stability and increasing the risk of flooding and landslides.
- Q: When will the heaviest rain occur?
- A: The heaviest rain is expected early Saturday morning and overnight into Sunday, with hourly intensity potentially reaching 50–80mm.
Extended Reading
Sources: Korea Meteorological Administration briefing, July 17, 2026; Chosun Ilbo report on capital area rainfall; Korea Daily photo coverage of Gwangnaru park; The Hankyoreh analysis of ground instability and safety risks.