OMAK, Wash. (AP) — Fire officials say a new wind-driven wildfire is threatening the historic St. Mary's Mission and school near Omak in north-central Washington.

KREM-TV reports that the fire first reported Tuesday afternoon had burned across roughly 1,000 acres — or 1 ½ square miles — of sagebrush and grass by Tuesday night.

The station says some students at the Paschal Sherman Indian School have been evacuated.

Okanogan County Sheriff Frank Rogers says winds peaked at about 40 miles per hour Tuesday evening.

Ike Cawston of the Confederated Tribes of the Colville Reservation tells The Wenatchee World that more than 75 firefighters from nearby agencies and the Washington state Department of Natural Resources are working to build fire lines and protect structures.

The fire has been burning near State Highway 155. The cause is under investigation.

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  • A house is engulfed in flames near Highway 48 and HW 38 junction east of Drumright, Okla., on Saturday, Aug 4, 2012. Emergency management officials have ordered evacuations of homes in several areas as wildfires burn across the state. The Oklahoma Department of Emergency Services says no injuries have been reported. (AP Photo/Tulsa World, Tom Gilbert)

  • Flames burn near Highway 48 and HW 38 junction east of Drumright, Okla., on Saturday, Aug. 4, 2012. Emergency management officials have ordered evacuations of homes in several areas as wildfires burn across the state. The Oklahoma Department of Emergency Services says no injuries have been reported. (AP Photo/Tulsa World, Tom Gilbert)

  • A home burns during a large wildfire Friday, Aug. 3, 2012 in Luther, Okla. A wildfire whipped by gusty, southerly winds swept through rural woodlands north and south of Oklahoma City on Friday, burning several homes as firefighters struggled to contain it in 113-degree heat. (AP Photo/The Oklahoman, Bryan Terry)

  • A house is engulfed in flames near Highway 48 and HW 38 junction east of Drumright, Okla., Saturday, Aug 4, 2012. While residents of one Oklahoma town sifted through their charred belongings Saturday to salvage what they could after a roaring wildfire that may have been deliberately set, residents in two other towns were being ordered to evacuate their homes. (AP Photo/Tulsa World Tom Gilbert)

  • Kellyville firefighter Levi Stephens fights a grassfire in Kellyville, Okla., near West 151st and the Turner Turnpike, Saturday, Aug 4, 2012. Emergency management officials have ordered evacuations of homes in several areas as wildfires burn across the state. The Oklahoma Department of Emergency Services says no injuries have been reported. (AP Photo/Tulsa World, Tom Gilbert)

  • Kellyville firefighter Levi Stephens fights a grassfire in Kellyville, Okla., near West 151st and the Turner Turnpike on Saturday, Aug 4, 2012. Emergency management officials have ordered evacuations of homes in several areas as wildfires burn across the state. The Oklahoma Department of Emergency Services says no injuries have been reported. (AP Photo/Tulsa World, Tom Gilbert)

  • Structures are engulfed in flames near Highway 48 and HW 38 junction east of Drumright, Okla., on Saturday, Aug 4, 2012. Emergency management officials have ordered evacuations of homes in several areas as wildfires burn across the state. The Oklahoma Department of Emergency Services says no injuries have been reported. (AP Photo/Tulsa World, Tom Gilbert)

  • Rebecca Kolar stands at the entrance to the three bedroom, brick home at 908 S. Dogwood Street where she and her husband, Douglas lived with their two children for 13 years before fire destroyed it, Saturday, Aug. 4, 2012 in Luther, Okla. While residents of one Oklahoma town sifted through their charred belongings Saturday to salvage what they could after a roaring wildfire that may have been deliberately set, residents in two other towns were being ordered to evacuate their homes. The fire near Luther, which is about 25 miles northeast of Oklahoma City, destroyed nearly five dozen homes and other buildings before firefighters were able to gain some measure of control Saturday.(AP Photo/The Oklahoman, Jim Beckel) TABLOIDS OUT

  • Tracy Streeper hugs five year-old grandson Jesse, as they stand on the north side of Streeper's destroyed home, Saturday, Aug. 4, 2012 in Luther, Okla. While residents of one Oklahoma town sifted through their charred belongings Saturday to salvage what they could after a roaring wildfire that may have been deliberately set, residents in two other towns were being ordered to evacuate their homes. The fire near Luther, which is about 25 miles northeast of Oklahoma City, destroyed nearly five dozen homes and other buildings before firefighters were able to gain some measure of control Saturday.(AP Photo/The Oklahoman, Jim Beckel) TABLOIDS OUT

  • A house is engulfed in flames near Highway 48 and HW 38 junction east of Drumright, Okla., on Saturday, Aug 4, 2012. Emergency management officials have ordered evacuations of homes in several areas as wildfires burn across the state. The Oklahoma Department of Emergency Services says no injuries have been reported. (AP Photo/Tulsa World, Tom Gilbert)

  • Victoria Landavazo holds youngest child, Axel, 1 year old, while wiping tears after arriving with other members of her family to see for the first time what the wildfire had done to their home, Saturday, Aug. 4, 2012 in Luther, Okla. While residents of one Oklahoma town sifted through their charred belongings Saturday to salvage what they could after a roaring wildfire that may have been deliberately set, residents in two other towns were being ordered to evacuate their homes. The fire near Luther, which is about 25 miles northeast of Oklahoma City, destroyed nearly five dozen homes and other buildings before firefighters were able to gain some measure of control Saturday.(AP Photo/The Oklahoman, Jim Beckel) TABLOIDS OUT

  • Flames and smoke threaten structures near Highway 48 and HW 38 junction east of Drumright, Okla. Emergency management officials have ordered evacuations of homes in several areas as wildfires burn across the state. The Oklahoma Department of Emergency Services says no injuries have been reported. (AP Photo/Tulsa World, Tom Gilbert)

  • Area firefighters fight a grass fire east of 120th at Cemetery Road on Friday, Aug. 3, 2012, east of Norman, Okla. A wildfire stirred by high winds sweeping through rural woodlands just south of the Oklahoma City area has set at a number of homes on fire. (AP Photo/The Oklahoman, Steve Sisney)

  • A helicopter drops water on a large grass fire east of 120th near Cemetery Road on Friday, Aug. 3, 2012, east of Norman, Okla. A wildfire stirred by high winds sweeping through rural woodlands just south of the Oklahoma City area has set at a number of homes on fire. (AP Photo/The Oklahoman, Steve Sisney)

  • Flames leap into the air as area firefighters fight a wildfire on Cemetery Road east of 120th on Friday, Aug. 3, 2012, east of Norman, Okla. A wildfire stirred by high winds sweeping through rural woodlands just south of the Oklahoma City area has set at a number of homes on fire. (AP Photo/The Oklahoman, Steve Sisney)

  • Ruth Hood hugs her dog Punky while waiting a gas station at SE 108th and Hwy 9 after evacuating her home near SE 132nd and Hwy 9 as a wildfire burns through Cleveland County near Norman, Okla., Friday, Aug. 3, 2012. A wildfire stirred by high winds sweeping through rural woodlands just south of the Oklahoma City area has set at a number of homes on fire. (AP Photo/The Oklahoman, Nate Billings)

  • Vin Bayne pours water for his pets while waiting at a gas station at Hwy 9 and SE 108 Ave. after evacuating his home as a wildfire burns through Cleveland County near Norman, Okla., Friday, Aug. 3, 2012. A wildfire stirred by high winds sweeping through rural woodlands just south of the Oklahoma City area has set at a number of homes on fire. (AP Photo/The Oklahoman, Nate Billings)

  • From left, Gayland Cannon, Eugene Hacker and Ron Ross wait at a gas station at SE108 and Hwy 9 after evacuating their homes in the area of SE 132nd and Cedar Lane as a wildfire burns through Cleveland County near Norman, Okla., Friday, Aug. 3, 2012. A wildfire stirred by high winds sweeping through rural woodlands just south of the Oklahoma City area has set at a number of homes on fire. (AP Photo/The Oklahoman, Nate Billings)

  • A mobile home burns at South Cedar and South 8th St., during a large wildfire, Friday, Aug. 3, 2012 in Luther, Okla. A wildfire whipped by gusty, southerly winds swept through rural woodlands north and south of Oklahoma City on Friday, burning several homes as firefighters struggled to contain it in 113-degree heat. (AP Photo/The Oklahoman, Sarah Phipps)

  • A smoke surrounds home during a large wildfire Friday, Aug. 3, 2012 in Luther, Okla. A wildfire whipped by gusty, southerly winds swept through rural woodlands north and south of Oklahoma City on Friday, burning several homes as firefighters struggled to contain it in 113-degree heat. (AP Photo/The Oklahoman, Sarah Phipps)

  • A home burns during a large wildfire Friday, Aug. 3, 2012 in Luther, Okla. A wildfire whipped by gusty, southerly winds swept through rural woodlands north and south of Oklahoma City on Friday, burning several homes as firefighters struggled to contain it in 113-degree heat. (AP Photo/The Oklahoman, Sarah Phipps)

  • Bill Ragle walks past the remains of his home that was destroyed by a wildfire in Mannford, Okla., Sunday Aug. 5, 2012. (AP Photo/Tulsa World Mike Simons)

  • In this Saturday, Aug. 4, 2012 photo, flames engulf a house near Highway 48 and HW 38 junction east of Drumright, Okla. The Oklahoma Department of Emergency Services says no injuries have been reported. (AP Photo/Tulsa World, Tom Gilbert)

  • Casey Strahan, lower left, and Logan Renner, 17, look at the reamins of their homes, Saturday, Aug. 4, 2012 in Luther, Okla. While residents of one Oklahoma town sifted through their charred belongings Saturday to salvage what they could after a roaring wildfire that may have been deliberately set, residents in two other towns were being ordered to evacuate their homes. The fire near Luther, which is about 25 miles northeast of Oklahoma City, destroyed nearly five dozen homes and other buildings before firefighters were able to gain some measure of control Saturday.(AP Photo/The Oklahoman, Jim Beckel) TABLOIDS OUT