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

Firefighters tackling the blazes in Los Angeles drop the vibrant red liquid on areas to both extinguish fires and prevent new blazes from cropping up. The liquid coats flammable materials in a ...

Also, sign up for NPR's breaking news alerts. Air tankers are dropping thousands of gallons of red flame retardant in the hills around Los Angeles as firefighters attempt to limit the devastation ...

Your breath blows away some of the hot air around the flame. If the liquid wax cools down enough ... When they get hot enough, these chemicals glow a particular color like red, green, purple, or blue.