The National Weather Service in Fort Worth has issued a Red Flag Warning for Tarrant County until 7 p.m. today. A Red Flag Warning means that extreme fire weather conditions are either occurring now or will shortly. A combination of strong winds, low relative humidity and dry vegetation can contribute to extreme fire behavior. Avoid all outside burning and welding today. Do not toss lit cigarette butts outside. Report wild fires to the nearest fire department or law enforcement office.