Toxic fumes are released in the spa of the Four Seasons in Milan: you are poisoned by a mistake during the cleaning, the intervention of the fire brigade is necessary

A toxic gas leak occurred at the Four Seasons spa in Milan on Friday morning, August 21, leading to the hospitalization of six individuals. The incident took place at the luxury hotel located on Via Gesù, in the heart of the Quadrilatero della moda district. During routine cleaning and disinfection procedures of the indoor pool, a chemical reaction produced harmful fumes, prompting an emergency response involving firefighters, medical personnel, and local health authorities. The cause of the incident was traced to an accidental mixing of sodium hypochlorite with hydrochloric acid during the maintenance process. This combination released toxic vapors that spread through the spa area. According to reports from Ansa, two workers involved in the cleaning operation, two hotel staff members, and two guests were affected and required medical attention. Emergency services were called to the scene and worked swiftly to ensure the safety of everyone present. Firefighters arrived on the scene and conducted air quality assessments while coordinating with health officials. Medical teams treated the affected individuals on-site before transporting them to nearby hospitals. Local health authorities, including technicians from the ATS (Azienda Sanitaria Territoriale), were also dispatched to evaluate the situation and provide guidance on further steps to ensure public safety. The error in handling the chemicals highlights potential risks associated with the use of strong disinfectants in commercial settings. Sodium hypochlorite, commonly used for its antimicrobial properties, can react dangerously with other substances such as acids. In this case, the improper mixture led to the release of chlorine gas, which is known to cause respiratory irritation and other health issues upon exposure. The Four Seasons hotel has since issued a statement acknowledging the incident and expressing regret over the disruption caused to guests and employees. They have committed to cooperating fully with the relevant authorities to investigate the circumstances surrounding the mishap and to implement additional safety measures to prevent similar occurrences in the future. Authorities are currently reviewing the protocols followed during the cleaning procedure to determine whether there were lapses in training or adherence to safety guidelines. Further inspections of the spa facilities are being planned to assess the extent of any damage and to ensure compliance with health and safety regulations. The incident serves as a reminder of the importance of proper handling and storage of hazardous materials in environments where large numbers of people gather.