What is 'pink powder' used to fight fires in California
What's the story
California, which is currently fighting horrific wildfires, has used a bright pink powder called Phos-Chek to contain the spread of flames.
The fire retardant, developed by Perimeter Solutions and approved by the USDA Forest Service in 1963, consists of water, ammonium phosphate fertilizer, and a thickening agent.
It sticks to vegetation, forming a fire-resistant barrier.
The bright color also acts as a visual guide for pilots and firefighters during aerial drops.
Retardant use
Phos-Chek's role and limitations in wildfire management
Phos-Chek is usually sprayed in front of a fire to coat vegetation and other flammable surfaces, preventing oxygen from feeding the fire.
This technique effectively creates a barrier that slows down the spread of flames.
However, strong winds can complicate aerial drops, scattering the powder before it hits its target.
Environmental experts have also raised concerns over the effect of fire retardants like Phos-Chek on ecosystems and human health.
Environmental impact
Legal and environmental concerns surrounding Phos-Chek
A 2022 lawsuit by Forest Service Employees for Environmental Ethics alleged aerial drops of fire retardants violated clean water laws.
A US District Court judge allowed the Forest Service to continue using fire retardants while securing an EPA permit.
Addressing these concerns, the Forest Service has phased out one formulation of Phos-Chek for a less toxic version and enforces restrictions on dropping retardants near sensitive environmental areas.
Ongoing crisis
Los Angeles wildfires: Current situation and response
As Los Angeles continues to battle devastating wildfires, firefighters are working around the clock to contain two massive fires that have razed over 12,000 structures and killed at least 24 people.
More crews and equipment have been deployed to strengthen containment lines ahead of forecasted strong winds of over 113 km/h.
Residents in high-risk areas have been urged to evacuate as conditions remain unpredictable.