The Greenwood Fire in northern Minnesota continues to grow at a rapid pace, swelling by more then 1,000 acres over the past 24 hours.
Authorities estimate the size of the blaze at about 3,200 acres as of Wednesday morning, with fire quickly consuming dry timber in a large area just southwest of Isabella, Minnesota. It was first detected around 3 p.m. Sunday, with dry, windy conditions accelerating its expansion from a few hundred acres, to 1,000, then at least 2,000 and now 3,200.
The cause of the first is still under investigation, Minnesota Incident Command System says.
Officials said the fire is 0% contained at this point, with Operation Section Chief Pete Glover explaining in a Facebook video that crews are probing for access opportunities along the eastern and western edges. He said the response remains in its "early stages."
The fire is bordered by County Highway 2 and the Sand Lake area to the west, with Greenwood Lake on the south end and McDougal Lake and Highway 1 up to the north.
The wildfire prompted an evacuation of the area, and the U.S. Forest Service closed off a number of recreation areas and entry points.
Glover noted there are several structures around Stony and McDougal Lake that could be at risk, with the U.S. Forest Service-Superior National Forest saying Wednesday: "The fire is threatening cabins, homes, and recreational sites."
The Forest Service said temperatures in the 90s are expected Wednesday, with a slight rise in humidity as well, adding it expects "active fire behavior."
The Incident Command System has said the blaze will likely keep pushing to the north.
The Minnesota Pollution Control Agency issued an air quality alert for nearby areas of Lake County due to the smoke. It will be in effect until at least 3 p.m. Friday.