Pyeongtaek K-55 White Phosphorus Leak Evacuation Order Lifted: Current Situation and Safety Guidelines for Residents
이 포스팅은 쿠팡 파트너스 활동의 일환으로, 이에 따른 일정액의 수수료를 제공받습니다.
This article is based on the latest available news reports and official information verified as of 2026-07-29 Korea Standard Time.
The evacuation order issued following the white phosphorus leak at Pyeongtaek K-55 was lifted at 6:13 p.m. on 2026-07-28. Pyeongtaek City advised residents to resume their normal activities, stating that the response inside the base had been completed. However, anyone who suspects direct exposure or experiences skin or eye irritation, coughing, or difficulty breathing should immediately call 119 and seek medical evaluation.
When Was the Evacuation Order for Pyeongtaek K-55 Lifted?
Pyeongtaek City sent the evacuation order cancellation notice at 6:13 p.m. on July 28. The message stated that the necessary measures inside the K-55 U.S. military base had been completed and asked nearby residents to return to their normal daily activities.
The sequence of events was as follows.
| Event | Time on July 28 | Confirmed Details |
|---|---|---|
| Initial report received | 5:7 p.m. | Report of a suspected chemical leak at K-55 base |
| Evacuation order issued | 5:37 p.m. | Nearby residents instructed to evacuate to a safe location |
| Evacuation order lifted | 6:13 p.m. | Response inside the base completed and residents advised to resume normal activities |
| On-site emergency response concluded | Approximately 6:37–50 p.m. | Reports indicated that firefighters and police personnel withdrew from the scene |
The time between the issuance and cancellation of the evacuation order was 36 minutes.
The time between the initial incident report and the cancellation was 66 minutes. Some reports describe the order as being lifted 'after approximately 30 minutes,' while others say it was lifted 'about an hour later.' This difference results from using different starting points for the calculation. Using the evacuation order issued at 5:37 p.m. gives 36 minutes, while using the initial report at 5:7 p.m. gives 66 minutes. These are the author's calculations, using `18:13-17:37` and `18:13-17:07`, respectively.
Why Was the Evacuation Order Lifted?
Pyeongtaek City lifted the evacuation order after receiving explanations from the U.S. military and on-site emergency response agencies that the risk to residents outside the base was low. According to reports, the U.S. military explained that the leaked substance had been diluted to approximately 80% and that the situation had been contained within the base.
According to a subsequent statement from the U.S. Air Force's 51th Fighter Wing, crystallized white phosphorus residue was discovered inside an ammunition container during a routine ammunition inspection. The U.S. military established a safety perimeter of approximately 300 meters, or 1,000 feet, and deployed an explosive ordnance disposal team. It stated that the safety perimeter was removed and normal base operations resumed after the situation was brought under control.
The currently disclosed grounds for this assessment can be summarized as follows.
The leak occurred inside the military base.
There was a distance between the base perimeter and civilian areas.
U.S. military explosive ordnance disposal personnel and fire authorities controlled the scene.
The U.S. military explained that the material had remained isolated within the ammunition and its container.
No casualties or injuries had been confirmed.
The on-site assessment that there was no risk of further spread was communicated to Pyeongtaek City.
However, lifting the evacuation order means that emergency response agencies determined that immediate evacuation of residents was no longer necessary. It should not be interpreted as confirmation that the exact quantity released, the cause of the incident, and all environmental measurement results have been conclusively established.
Do Residents Still Need to Evacuate or Keep Their Windows Closed?
If residents have not received a new evacuation order since the cancellation message issued at 6:13 p.m. on July 28, they do not need to remain evacuated solely because of the earlier emergency alert. Pyeongtaek City advised residents to resume their normal daily activities.
However, if new smoke, a strong irritating odor, an expansion of restricted areas, or additional emergency alerts are reported, the newly issued instructions should take priority over the earlier cancellation notice.
Residents should currently check the following.
1. Check whether any additional emergency alerts have arrived on your mobile phone.
2. Check follow-up announcements from Pyeongtaek City and the U.S. Air Force at Osan Air Base.
3. Do not approach roads near the base that are restricted by police or military personnel.
4. Do not touch unidentified crystals, liquids, or signs of combustion found near the base.
5. If exposure is possible or symptoms develop, call 119.
Receiving an emergency alert alone does not mean that a person was exposed to white phosphorus. The possibility of exposure should be assessed by considering the distance from the incident site, the person's location at the time, whether there was direct contact with smoke or the substance, and whether symptoms have developed.
Why Is White Phosphorus Considered Dangerous?
White phosphorus, also known as yellow phosphorus, is a white or yellowish solid substance. It can ignite when exposed to oxygen in the air, and combustion can produce thick smoke that irritates the eyes and respiratory tract.
Direct contact with the skin can cause deep burns through a combination of heat and chemical reactions. If burning particles remain attached to the skin or clothing, they may reignite when exposed to air again.
Possible symptoms of smoke inhalation include:
Stinging eyes and excessive tearing
Irritation of the throat or nose
Coughing
Headaches
Chest tightness
Shortness of breath or difficulty breathing
The World Health Organization explains that systemic symptoms following severe exposure may appear up to 24 hours later. Therefore, anyone who was close to the incident site or directly exposed to smoke or the substance should not delay medical evaluation if symptoms develop, even after the evacuation order has been lifted.
What Should You Do If White Phosphorus May Have Contacted Your Skin or Eyes?
Do not attempt to remove unidentified particles or residue with bare hands. First, move away from the incident site and call 119. White phosphorus particles can reignite upon contact with air, making it dangerous for untrained individuals to handle them directly.
If direct contact with the skin or eyes is suspected, follow these steps.
1. Immediately move away from the smoke and the leak site.
2. Call 119 and report possible exposure to white phosphorus or another chemical substance.
3. If the substance enters your eyes, do not rub them. Rinse them with clean running water.
4. If the substance contacts your skin, thoroughly wet the affected area with clean water or saline solution.
5. Do not attempt to remove attached particles directly with your hands or tools.
6. Prevent others from touching potentially contaminated clothing and belongings, and follow instructions from emergency responders.
7. Do not apply ointments or oil-based products on your own.
Guidance from the World Health Organization and the U.S. Centers for Disease Control and Prevention also recommends using clean water or saline solution to keep affected areas wet following white phosphorus exposure and allowing trained medical or emergency personnel to remove particles.
What Has Been Confirmed So Far, and What Remains Unverified?
According to information released so far, the evacuation order has been lifted, the incident has been contained, no casualties or injuries have been reported, and normal base operations have resumed. The U.S. military stated that there was no continuing danger to personnel either inside or outside the base.
However, the following details still require confirmation through final official announcements.
| Confirmed Information | Information Requiring Further Verification |
|---|---|
| Evacuation order lifted at 6:13 p.m. | Exact quantity of material released |
| Site control and decontamination operations conducted | Direct cause of the leak |
| No casualties or injuries reported so far | Detailed condition of the ammunition and its container |
| Announcement that normal base operations had resumed | Outdoor air and soil measurement results |
| U.S. military explanation that no continuing danger existed outside the base | Final investigation findings from South Korean and U.S. authorities |
Initial South Korean reports stated that material had leaked from 2 white phosphorus warheads. A later U.S. Air Force statement said that crystallized white phosphorus residue had been discovered inside an ammunition container during a routine inspection. Because the two explanations differ in their details, the precise nature and cause of the incident should be verified through the final investigation findings.
Frequently Asked Questions
Is Pyeongtaek K-55 a Military Base Located in Osan City?
Although K-55 is known as 'Osan Air Base,' the incident site is administratively located in Seotan-myeon, Pyeongtaek City, Gyeonggi Province. The name can lead people to mistakenly believe that the incident occurred in Osan City.
이 포스팅은 쿠팡 파트너스 활동의 일환으로, 이에 따른 일정액의 수수료를 제공받습니다.