Parts of Southern California are covered with pink fire retardant as firefighters try to control deadly wildfires raging in ...

The U.S. Forest Service bans the use of long-term fire retardant on federal lands near waterways or endangered species ...

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?