As the first heat wave of summer plunges California into yet another wildfire season, some environmental groups are taking aim at a commercial fire retardant that most residents have grown all too ...

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Aircraft battling fires raging through the Los Angeles area are dousing the area with more than water: Hundreds of thousands of gallons of hot-pink fire suppressant have been dropped ahead of the ...

Aerial fire suppressants are generally a mixture of water, ammonium phosphate — essentially fertilizer — and iron oxide, which is added to make the retardant visible, said Daniel McCurry, a civil and ...

It’s widely used because it can slow flames in ways that water can’t. But it also contains heavy metals and other harmful compounds. By Hiroko Tabuchi From above the raging flames, these planes can ...

This is a developing story. For the latest local updates, head to LAist.com. Also, sign up for NPR's breaking news alerts. Air tankers are dropping thousands of gallons of red flame retardant in the ...

Authorities battling a series of large wildfires in the Los Angeles area have employed a bright red fire retardant to tamp the flames, leading to dramatic images of the material blanketing scores of ...