Streets in Southern California were painted red this week as planes continue to fly overhead dropping red clouds over burned areas. But why is it red?

Chek, a red fire retardant that prevents fire spread by creating a protective barrier on plants, are being used by firefighting planes to combat catastrophic wildfires in Los Angeles. Despite its effectiveness,

Crews battling the deadly Los Angeles wildfires have been dropping a bright pink fire retardant across the city ahead of the advancing flames – leaving some wondering what the substance is, and how safe it is for the public and environment.