A wildfire is burning in the southern Polk County and has closed portions of CR 640 and 555.Polk County Fire Rescue said a 1,200-acre wildfire is burning in Bartow in a grassy former mine pit. PCFR said no injuries have been rep orted and no structures are threatened. A gooseneck trailer has burned. The fire is 40 percent contained as of 7:29 p.m., according to the Florida Forest Service wildfire map. ...read more read less