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14 March 2025
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Inside the Plainfield Mega-Warehouse Fire: critical lessons for firefighters, US
The 2024 Mega-Warehouse Fire Incident Report, conducted by the National Fallen Firefighters Foundation, provides a comprehensive analysis of the devastating blaze that occurred at a mega-warehouse facility in Plainfield, Indiana, on 15 March 2022. The fire, which led to over $500 million in property loss, underscores the challenges and risks associated with mega-warehouses. Despite advanced fire protection systems and a robust response from the Plainfield Fire Territory (PFT), the incident resulted in the destruction of the facility. The report aims to provide critical lessons and recommendations to prevent similar occurrences in the future.
Incident overview
The fire originated on the second level of a multi-level Pick Module within the 1.4-million-square-foot order fulfilment centre. Initially, the sprinkler system successfully contained the fire, allowing firefighters to fully extinguish visible flames within minutes of their arrival. The areas surrounding the fire were checked for extension and none was found. A large portion of the building was filled with cold smoke that obscured visibility but all indications were the fire was extinguished. The order was given to shut down the sprinkler system, a task that took time due to the complexity of the system. Within ten minutes of the system being shut down, flames re-emerged and spread uncontrollably through the upper levels of the building. Heavy smoke descended to the floor, creating hazardous conditions for firefighters, three of whom narrowly escaped death after declaring a MAYDAY.
Fire response and operational challenges
The firefighting operations faced numerous obstacles. Upon arrival, the PFT was advised 55 employees were unaccounted for in structure. The cold smoke within the vast steel-framed structure severely limited visibility, complicating both search efforts and ventilation. Firefighters encountered difficulty locating and shutting down the appropriate sprinkler valves, as the building had 30 roof-level sprinkler systems and eight additional systems for the multi-level Pick Module. Communication issues further hampered coordination efforts within the large facility.
Despite the initial success of the sprinklers, the re-emergence of flames and rapid fire spread overwhelmed the fixed fire systems. Efforts to regain control by restarting the fire pumps proved ineffective. Eventually, a defensive firefighting strategy was adopted, but the fire consumed the entire facility, resulting in its total loss.
Critical factors and analysis
Lessons learned
The Plainfield incident provides several important lessons for the fire service and facility operators:
Recommendations
The report offers several recommendations to enhance fire protection and response strategies for mega-warehouses:
Conclusion
The Plainfield fire serves as a stark reminder of the significant fire risks inherent in mega-warehouse facilities and the limitations of current fire protection systems. The report emphasizes the importance of preparedness, the need for enhanced innovation in fire protection design and strategic firefighting operations to mitigate risks and protect lives and property. By implementing the lessons and recommendations outlined in the report, fire departments and facility managers can enhance their ability to prevent and respond to future incidents.
Download the report: PDF
Source: FireHero.org
Incident overview
The fire originated on the second level of a multi-level Pick Module within the 1.4-million-square-foot order fulfilment centre. Initially, the sprinkler system successfully contained the fire, allowing firefighters to fully extinguish visible flames within minutes of their arrival. The areas surrounding the fire were checked for extension and none was found. A large portion of the building was filled with cold smoke that obscured visibility but all indications were the fire was extinguished. The order was given to shut down the sprinkler system, a task that took time due to the complexity of the system. Within ten minutes of the system being shut down, flames re-emerged and spread uncontrollably through the upper levels of the building. Heavy smoke descended to the floor, creating hazardous conditions for firefighters, three of whom narrowly escaped death after declaring a MAYDAY.
Fire response and operational challenges
The firefighting operations faced numerous obstacles. Upon arrival, the PFT was advised 55 employees were unaccounted for in structure. The cold smoke within the vast steel-framed structure severely limited visibility, complicating both search efforts and ventilation. Firefighters encountered difficulty locating and shutting down the appropriate sprinkler valves, as the building had 30 roof-level sprinkler systems and eight additional systems for the multi-level Pick Module. Communication issues further hampered coordination efforts within the large facility.
Despite the initial success of the sprinklers, the re-emergence of flames and rapid fire spread overwhelmed the fixed fire systems. Efforts to regain control by restarting the fire pumps proved ineffective. Eventually, a defensive firefighting strategy was adopted, but the fire consumed the entire facility, resulting in its total loss.
Critical factors and analysis
- The report highlights several critical factors contributing to the fire’s escalation:
- Fire protection systems: While the facility was equipped with advanced fire suppression systems, including ESFR (Early Suppression Fast Response) sprinklers, CMDA (Control Mode Density Area) sprinklers, redundant 2,500 gallon per minute pumps (electric and diesel) and 2 (300,000-gallon) water storage tanks, these systems are designed to operate for 2 hours. Fire alarm systems must be monitored by the fire department to maintain awareness of signals for changing conditions.
- Vertical fire spread: Analysis suggests the fire likely smouldered undetected on upper levels for 30 to 40 minutes, potentially finding a path to ignite combustible goods above. The fire pumps were shut down just as this secondary fire began to develop, rendering the upper-level sprinklers inoperable.
- Complex structural configuration: The multi-level Pick Module, combined with a high combustible load, created an extremely challenging fire environment.
- Communication and coordination: Difficulties in radio communication and challenges with fire pump operations impeded a timely and effective response.
Lessons learned
The Plainfield incident provides several important lessons for the fire service and facility operators:
- Improved training: Fire departments must recognise operations in large, complex warehouse environments far exceed standard training for residential and small commercial fire scenarios. The PFT frequently trained on this target hazard as their response area contains many such structures but was still overwhelmed by several factors.
- Pre-fire planning: Familiarity with building layouts, fire protection systems and potential risks is essential. Fire departments should conduct regular pre-fire planning visits.
- Enhanced fire protection standards: The report calls for a re-evaluation of fire suppression strategies, particularly for multi-level rack storage systems.
- Firefighting tactics: Fire departments should be prepared to adopt a different approach to fighting fires in mega warehouses. Leaving automatic protection systems in service for longer periods than past best practice recommendations may be warranted. Consideration should be given to the weight sodden contents are placing on the module’s structural stability. The contents of the building contacted by smoke and water is most likely unsalvageable. Shifting to defensive tactics when conditions become unsafe or uncontrollable is advised.
Recommendations
The report offers several recommendations to enhance fire protection and response strategies for mega-warehouses:
- Specialised fire training: Develop training programs specifically tailored to the unique dynamics of mega-warehouse fires.
- Enhanced fire protection systems: Reassess sprinkler design and fire suppression methods to better handle complex rack storage environments.
- Communication improvements: Invest in advanced communication technologies to overcome signal challenges within large steel structures.
- Operational strategies: Establish clear guidelines for when to maintain or shut down sprinkler systems during firefighting operations.
- Prevention and inspections: Conduct rigorous maintenance and inspections to identify and address vulnerabilities in fire protection systems.
Conclusion
The Plainfield fire serves as a stark reminder of the significant fire risks inherent in mega-warehouse facilities and the limitations of current fire protection systems. The report emphasizes the importance of preparedness, the need for enhanced innovation in fire protection design and strategic firefighting operations to mitigate risks and protect lives and property. By implementing the lessons and recommendations outlined in the report, fire departments and facility managers can enhance their ability to prevent and respond to future incidents.
Download the report: PDF
Source: FireHero.org