The 2,000 residents of St. George in Charlton county are under a mandatory evacuation order issued Saturday after the Okefenokee wildfire began encroaching onto private property. Pushed by 40 mph winds, the fire jumped containment about 3:00 Fridayafternoon and burned 20,000 acres in Georgia and Florida. A temporary shelter has been opened in the Folkston Elementary School gym. Residents in parts of Nassau County, Florida have been asked to prepare now, in case an evacuation becomes necessary.In addition, strong afternoon winds whipped up a woods fire Friday that briefly threatened homes in eastern Brantley County near Post Road, which forms the Glynn County line. Glynn firefighters responded to assist Brantley in protecting homes near the blaze.