As Los Angeles grapples with devastating wildfires, one striking element in the firefighting efforts is the widespread use of a bright pink fire retardant known as Phos-Chek. This specialised chemical, dropped from aircraft and sprayed on vulnerable areas, has become a critical tool in slowing the advance of flames threatening lives and property.
Developed by Perimeter Solutions, Phos-Chek has been at the forefront of wildfire suppression for over six decades. First approved by the USDA Forest Service in 1963, the fire retardant has evolved through continual innovation. The company explains that Phos-Chek is more than just a product; it represents a comprehensive firefighting solution. This includes maintaining airbases, supplying advanced equipment, and ensuring an efficient supply chain to deliver resources wherever they are needed most.
The vivid pink colour of Phos-Chek serves a practical purpose. It acts as a visual marker for pilots and firefighters, ensuring accurate application during aerial drops. Over time, the dye fades to neutral earth tones when exposed to sunlight, blending back into the natural landscape.
Phos-Chek is composed of water, ammonium phosphate fertiliser, and a thickening agent to enhance its stickiness. These ingredients help it adhere to vegetation, creating a fire-resistant barrier. The fertiliser element also aids in the regeneration of scorched land post-fire.
As of Monday, firefighters have been working tirelessly to contain two major fires in the Los Angeles area, which have destroyed over 12,000 structures and claimed at least 24 lives. Additional crews and equipment, including water trucks and aerial resources deploying Phos-Chek, have been mobilised to fortify containment lines ahead of predicted strong winds. LA County Fire Chief Anthony Marrone warned that winds exceeding 70 mph could significantly hinder their efforts.
Residents in high-risk areas have been urged to evacuate as conditions remain unpredictable. Among them, Tabitha Trosen shared her preparedness, keeping her cats’ carriers by the door and reflecting on the irreplaceable memories at risk.