Besides Cal Fire, multiple agencies have dropped fire retardant and water, including the U.S. Forest Service, the Los Angeles and Ventura county fire departments, the city and the National Guard.

As fire crews and air tankers work to block the wildfires' explosive growth, images of red clouds of fire retardant falling onto trees are common. What is it — and what's in it?

Besides Cal Fire, multiple agencies have dropped fire retardant and water, including the U.S. Forest Service, the Los Angeles and Ventura county fire departments, the city and the National Guard.

The proposal stemmed from a court ruling requiring the Forest Service to get permission from EPA to drop fire suppressants ...

Besides Cal Fire, multiple agencies have dropped fire retardant and water, including the U.S. Forest Service, the Los Angeles and Ventura county fire departments, the city and the National Guard.

The long-term retardant is a common fire-suppression tool that has been used for more than half a century. It is approved for use by the U.S. Forest Service, however, citing environmental concerns, ...

The company has made several different versions of Phos-Chek, but the U.S. Forest Service currently uses Phos-Chek MVP-Fx. Fire retardants help suppress wildfires by slowing the rate at which ...

Besides Cal Fire, multiple agencies have dropped fire retardant and water, including the U.S. Forest Service, the Los Angeles and Ventura county fire departments, the city and the National Guard.

As wildfires intensify, state and federal fire agencies are relying more on aerial fire retardant, sparking concerns over its ...