Firefighters working to contain the 30th Ave fire in Golden Gate Estates. GOLDEN GATE ESTATES, Fla. A massive brush fire that destroyed four homes earlier this month in Collier County is 85 percent contained, the Florida Forest Service said. #30thAveFire s now 85% contained and still 7,068 acres #FLfire#wildfire pic.twitter.com/x8U8pZdz6o — Caloosahatchee FC (@FFS_cafc) April 30, 2017 The fire, which broke out April 20, covers an estimated 7,068 acres, according to state forest officials. The cause of the flames remains under investigation.