GRAND CANYON, Ariz. (AP) -- Officials at Grand Canyon National Park say a prescribed fire on the North Rim is expected to produce residual smoke for several days or weeks.
The U.S. Forest Service and the National Park Service are teaming up for the burn, which starts Monday and will last through Wednesday as long as conditions remain favorable.
Crews will be targeting an area of ponderosa pine and mixed conifer stands west of Highway 67 and south of the Kaibab National Forest boundary.
About 1,000 acres will be treated. That includes 500 acres that were previously burned during a 2003 wildfire.
Crews will be monitoring wind speed and direction, humidity levels, temperature, fuel conditions and other factors during the burn. They say they will only ignite the fire if they are within certain parameters.