A massive fire engulfed a forested area of about four kilometres in Mumbai's Aarey Colony in Goregaon on Monday evening. Firefighters scrambled to contain the flames that threatened tribal residents who live in the area and the plants and wildlife in the city's biggest green lung. Fire department officials said they have doused blaze. Earlier, the winds coming from the hills were helping it spread to nearby residential areas. There were no reports of human casualties in the blaze so far.