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?

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 ...

Some of the visuals coming out of Los Angeles County over the past week show a vivid pink substance coating streets, cars and plants. This is fire retardant, dropped by aerial firefighting tankers in ...

they have also grounded aircraft that are flying fire suppression missions. Planes dumping water and retardant on impacted areas have been unable to take to the sky at times since the fires began ...

Air tankers and chemical fire retardants have been used since the ... he says — who guide massive planes through low-altitude drops over challenging terrain. "You know, some of those guys ...

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 ...