The blaze has destroyed 52,550 ha with wind gusts and dry conditions raising the risk of conflagration spreading.

Firefighters were battling on Sunday to prevent a fire in a southern Georgia wildlife refuge from spreading, authorities said.

The Okefenokee National Wildlife Refuge said in a statement that “extremely dangerous burning conditions persist” and that 11,000 acres (4,450 hectares) have been consumed by fire in the past two days. The unincorporated community of St. George is under a mandatory evacuation order and Charlton County schools have been closed for Monday. Wind gusts and dry conditions were raising the risk of the fire spreading.

The fire in total has burned 1,29,856 acres (52,550 hectares), and wind gusts and dry conditions were raising the risk of the fire spreading, the statement said.

535 personnel on it

Some 535 personnel had been assigned to fight the fire, along with 10 helicopters, 55 wildland fire engines, bulldozers and other equipment, the statement said. The fire is 12 per cent contained.

The area, on the Georgia-Florida line, is also under a dense smoke advisory that is expected to impact visibility in the towns of St. George, Callahan, Ratliff and northern Duval County near the Jacksonville International airport. Some road closures were in effect and the main entrance to the refuge was closed.

A temporary shelter has been opened in the gymnasium at the Folkston Elementary School. County Administrator Shawn Boatright has said it will stay open indefinitely.

“We’re not sure what’s going to happen right now, so it’s open until further notice,” he said.

The wildfire was sparked by lightning April 6 and has since burned almost entirely within the Okefenokee refuge boundaries — and some public forest land in north Florida — for the past month. However, fire spread to private land around the refuge Friday, burning an estimated 1,000 acres (405 hectares).