On May 14, a sudden disaster shattered the tranquility of the small town of Guadaira in southern Spain. That afternoon, a chemical warehouse in the industrial park of Guadaira, located about 16 kilometers southeast of Seville, suddenly caught fire and exploded. The massive explosion echoed like thunder, sending thick smoke billowing into the sky, visible from several kilometers away. The shockwave from the explosion caused windows in many nearby homes to shake violently. Maria, a resident at home, recalled in fear, “I felt like the house was going to collapse. The explosion made my ears ring, and smoke quickly started pouring in through the door cracks. I quickly took my children and hid in the basement.”
According to local emergency services, after receiving the alarm, they quickly activated the emergency response mechanism. A large number of fire trucks, ambulances, and police cars rushed to the scene, their flashing red and blue lights standing out against the thick smoke. However, the rescue operation encountered difficulties from the start. Due to the unknown nature of the chemicals stored in the warehouse, firefighters were cautious about using standard firefighting methods. They carefully used thermal imaging devices to assess the situation inside the fire, attempting to locate the origin of the fire and any potential hazardous chemicals. Rescue personnel evacuated workers from the industrial park and urgently issued a “stay at home” order for approximately 77,000 residents of Guadaira via radio, text messages, and other channels to “close doors and windows to prevent smoke from entering.”
According to the Associated Press, the company involved is a chemical product packaging and distribution business. The company’s website states that it occupies approximately 11,000 square meters of land within the industrial park, including a large warehouse where various chemicals are stored. Industry experts revealed that such companies often store a wide range of chemicals with complex properties, and an accident could easily trigger a chain reaction. Without proper improvement and development, accidents involving chemicals can lead to catastrophic consequences.
Guadaira’s Mayor, Ana Isabel Jiménez Contreras, expressed grave concern in an interview, stating that the fire originated in a chemical warehouse, “apparently” caused by a “toxic” product storage tank catching fire. “We have been told the danger no longer exists because the storage tank has been destroyed, so the toxic substance is no longer present.” However, the cause of the incident is still under investigation, and authorities have not disclosed the specific chemicals involved. Experts note that the harmful effects of chemicals after an explosion and combustion can vary significantly, and identifying the chemical types is crucial for subsequent rescue and environmental management. For example, if chlorine-based chemicals exploded, they could release highly toxic gases such as chlorine or phosgene, which could severely damage the respiratory and nervous systems. If organic chemicals are burned, they could release persistent organic pollutants such as dioxins, which could cause long-term contamination of soil and water sources.
At the rescue scene, firefighters, wearing heavy protective suits and gas masks, risked high temperatures and the possibility of secondary explosions as they worked to extinguish the fire. Unable to identify the chemicals involved, they took the most cautious approach, gradually advancing into the fire and using foam to cover the flames to prevent them from spreading. During the lengthy firefighting process, some firefighters had to retreat for emergency suit replacements due to wear and damage caused by the intense heat and chemical corrosion. After hours of hard work, the fire was eventually brought under control. In the medical area, two people were treated for minor injuries, including a worker who suffered burns, with skin covered in scars, and another who suffered from severe coughing after inhaling smoke. Medical personnel provided emergency care and reassurance.

This marks the second such incident in Spain within a week. On May 10, a warehouse storing swimming pool cleaning products in the coastal city of Villanueva – Huelva, south of Barcelona, caught fire, releasing toxic chlorine gas. The Spanish civil defense department urgently stated on social media, advising more than 160,000 people in affected areas to stay indoors and take precautions. These two serious chemical safety accidents in a short period have sparked strong public concerns in Spain about chemical industry safety regulations. Many people have taken to social media to demand that the government increase its oversight of chemical companies, conduct thorough safety checks, and prevent similar tragedies from happening again. Experts from the Spanish Chemical Industry Association point out that the number of chemical companies in Spain has been steadily increasing in recent years, but some companies, in pursuit of profits, have not invested enough in safety facilities and staff training. Additionally, regulatory agencies have overlapping responsibilities and insufficient enforcement, leading to long-standing safety risks.
After the explosion, local environmental departments swiftly began monitoring air quality, soil, and water sources. Within 24 hours, 10 monitoring stations were set up around the area to monitor harmful gas concentrations in the air and pollutant levels in water bodies. Should pollution levels exceed the limits, corrective actions will be taken to ensure the safety of residents’ living environments. Additionally, Spanish authorities have formed an investigation team to conduct a comprehensive review of the company’s safety production qualifications, daily management, and risk prevention measures. If any violations are found, the company will be severely punished by the law, and the public will be informed. Furthermore, relevant EU agencies have expressed concern about the incident and stated they would evaluate the safety management of the Spanish chemical industry and potentially push for revisions and improvements to chemical safety regulations across the EU.
Currently, residents of Guadaira remain anxious and on edge, closely monitoring the aftermath of the incident. Supermarkets have reported a significant increase in food and bottled water sales as many residents worry that contamination may affect the supply of everyday necessities. Local schools have temporarily closed and switched to online teaching. This explosion not only posed a threat to the safety and well-being of residents but also served as a wake-up call for chemical companies worldwide regarding the importance of safe production. How to ensure chemical production safety while developing the economy has become an urgent issue that needs to be addressed. In the future, whether the Spanish government can learn from this incident and improve the chemical industry’s safety regulatory system will also be a focus of international attention.