Authorities evacuated hundreds of homes after a massive wildfire along the Georgia-Florida border jumped a containment line overnight.
Dry weather and 15 mph (24 kph) wind in north Florida was expected to further hinder firefighters.
Between 250 and 500 homes west of U.S. 441 had to be evacuated for a second time when the fire line was breached, Florida Highway Patrol Lt. Michael Burroughs said. An additional 570 people who were ordered out of homes east of the roadway were still waiting to return.
The wildfire had raced through the Okefenokee Swamp in southeast Georgia and into northern Florida after being started by lightning more than a week ago. By Tuesday, it had burned 109,000 acres (44,112 hectares) in Florida and 139,813 acres (56,581 hectares) of swampland in Georgia nearly 390 square miles (1,010 square kilometers) in all.
Flames jumped the containment line at the fire's western edge in Florida overnight, said Leslie Auriemmo, a spokeswoman for the U.S. Forest Service.
On the western edge of the Okefenokee Swamp in Georgia, Fargo residents were told to stay alert as wind forecast at up to 20 mph (32 kilometers) pushed the blaze against fire breaks plowed between the swamp and the city of 380 people.
"Everybody's being told not to let their guard down, don't unpack," said Laura Polant, a fire information officer in Fargo. "Residents are still being told to be prepared to leave, because the call can come at any time."
Firefighters have used water-dropping helicopters and built containment lines in hopes of stopping the wildfire and keeping it away from homes.
In Florida, the blaze was 50 percent contained Tuesday. The smoke had lifted enough to open Interstates 10 and 75 to traffic, but drivers were warned that periodic closures were still possible.
Another large wildfire, in northeastern Minnesota and Ontario, could be brought under control by the end of the week, officials said. No one has been seriously hurt in the fire, which has burned 117 square miles of Minnesota and Canada, but many cabins and smaller structures more than 100 in all have been destroyed.
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