Suffolk County Fire, Rescue and Emergency Services Commissioner Rudy Sunderman said the fire will not be considered completely "contained" until 10-foot breaks are built around the full perimeter of the fire, where combustible materials and elements are removed to prevent it from reigniting and spreading.

New York's governor triggered a burn ban for the area. She issued a prohibition on most types of outside camping, cooking and warming fires in Long Island, as well as parts of the Hudson Valley amid continued dry conditions. Backyard fire pits, small campfires and small cooking fires in contained conditions were exempt.

Law enforcement agencies are still interviewing all 911 callers to rule out any possibilities, but they "strongly feel that it was accidental."