BELLVUE, Colo. — Firefighters are making progress on a 93-square-mile wildfire in northern Colorado that has destroyed more homes than any other in state history, but more residents were warned Tuesday to be ready to leave because of a spot fire that ignited near the main fire.

Meanwhile a fire burning on an estimated 250 acres of private land west of Craig was threatening structures and prompted an unknown number of evacuations Tuesday night, Bureau of Land Management spokesman David Boyd said.

The larger blaze west of Fort Collins was 55 percent contained after firefighters labored in temperatures in the 90s to extend lines around the fire Monday. Cooler temperatures were expected Wednesday, with a chance of isolated thunderstorms Thursday.

The fire already has destroyed at least 189 homes since it was sparked by lightning June 9. Incident commander Bill Hahnenberg said it could be weeks or even months before it's finally controlled.

The wildfire is one of several across the West forcing people to flee, including another blaze in Colorado that has driven out nuns living in a monastery, Boy Scouts at camp and residents of about 150 homes.

The Protection of the Holy Virgin Monastery was evacuated as a precaution Sunday after the fire started in the foothills west of Colorado Springs.

A nun who returned to feed the chickens at the remote monastery Tuesday said the fire was about two miles from the site. She said sacred items from the chapel, including a chalice, along with insurance papers and historical documents were removed Sunday as slurry bombers flew over the property.

The fire has burned nearly 2 square miles, and fire managers said it still has the potential to grow in an area where logs are drier than pine boards from a lumber yard.

U.S. Forest Service Chief Tom Tidwell said Tuesday his agency is adding four heavy helicopters to its firefighting fleet. Two S-61s owned by Siller Helicopters of Yuba City, Calif.; an S-64 Skycrane owned by Erickson Air Crane of Central Point, Ore.; and an S-70 owned by Firehawk Helicopters of Leesburg, Fla., will be available for any fire in the U.S., he said.

In California, firefighters were able to contain 75 percent of a nearly 1,000-acre wildfire in mountainous eastern San Diego County despite gusty winds that kicked up Tuesday and low humidity levels.

It remained calm around the fire east of Campo from Monday night into Tuesday despite wind warnings, and firefighters were able to increase containment from 30 percent to 75 percent, said Capt. Mike Mohler of the California Department of Forestry and Fire Protection.

More than 900 firefighters were battling the rural blaze Tuesday afternoon. Full containment was expected Wednesday night.

One mobile home and recreational vehicle were burned, and 150 homes have been evacuated. Evacuation orders remained in effect Tuesday because of road conditions and emergency equipment in the area, Mohler said.

One firefighter was treated for minor heat exhaustion and returned to duty. The cause of the wildfire, which started Sunday, is under investigation.

Elsewhere:

_ In Idaho, a fast-moving wildfire near Mountain Home destroyed six homes and several outbuildings Monday evening. Bureau of Land Management spokeswoman Mallory Eils said 25 to 30 homes in the area were evacuated before firefighters got the blaze under control. The fire burned about 150 acres. Its cause was unknown.

_ In Wyoming, more experienced fire managers and crews took over the fight against a wildfire burning in a rough, mountainous area of the Medicine Bow National Forest. The fire has burned about four square miles since Sunday. About 40 residents of the area's scattered ranches and cabins have been advised to evacuate. There was no containment of the fire as of Tuesday afternoon, and its cause remained under investigation.

_ In New Mexico, firefighters were taking advantage of favorable weather conditions to battle a wildfire that has destroyed 242 homes and businesses. More than 1,100 firefighters remained in Ruidoso as they fight to hold the Little Bear Fire that is now 60 percent contained.

Another fire broke out Monday and burned three structures along a 5-mile stretch of the San Juan River in far northwestern New Mexico. The fire, burning east of Bloomfield, has charred about 350 acres and is 50 percent contained.

A fire in the Gila Wilderness, already the largest in state history, grew another 1,000 acres to 463 square miles and is 80 percent contained.

_ In Arizona, firefighters were building containment lines around a 3,700-acre blaze on the Tonto National Forest to try to protect electric transmission lines that provide power to the state's major metropolitan areas. The fire was 15 percent contained Tuesday.

_ In Nevada, a 10,000-acre wildfire north of Ely was 15 percent contained. Aerial mapping showed the fire was smaller than thought.

_ In northwest Nebraska, a fire has charred an estimated 5,000 acres in Sioux County. Fire officials said it was 50 percent to 65 percent contained Tuesday afternoon.

_ In Hawaii, Maui firefighters continue to monitor a wind-driven wildfire that prompted an evacuation and damaged three homes. Fire officials said Tuesday the upcountry Kula fire had burned about six acres and was 90 percent contained. The fire started Monday.

Big Island firefighters are battling a large brushfire that closed a hospital emergency room and required 15 patients to be evacuated. Fire officials say heavy smoke from a wildfire that started Monday at a macadamia nut orchard required the evacuation of Kau Hospital, in Pahala, as flames got within 75 yards away. Patients were relocated to a community center, about 13 miles away. No homes were evacuated. An estimated 2,300 acres burned as of Tuesday afternoon, with the fire still not contained.

LOOK: Dramatic photos, video of the High Park Fire
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  • A birdfeeder hangs in front of a home d

    A birdfeeder hangs in front of a home destroyed by the High Park Fire, in Bellvue, Colorado west of Fort Collins June 30, 2012. The High Park Fire burned more than 87,000 acres and left one person dead and destroyed 259 homes making it the second-largest and second-most destructive fire in Colorado state history. The High Park Fire is 97 percent contained while the Waldo Canyon Fire, which has burned more than 17,000 acres, left at least two people dead and destroyed 346 homes is 45 percent contained. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

  • Maggie Baker looks over item retrieved f

    Maggie Baker looks over item retrieved from her brother-in-law's home which was burnt to the ground in the High Park Fire, June 30, 2012 in Bellvue, Colorado west of Fort Collins. The inferno burned more than 87,000 acres and left one person dead and destroyed 259 homes. The High Park Fire, which started June 9 from a lightning spark, is the second-largest and second-most destructive fire in Colorado state history. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

  • Maggie Baker (R) and her sister-in-law N

    Maggie Baker (R) and her sister-in-law Nellie Bowman walk through the remains of her brother-in-law's home which was burnt to the ground in the High Park Fire, June 30, 2012 in Bellvue, Colorado west of Fort Collins. The inferno burned more than 87,000 acres and left one person dead and destroyed 259 homes. The High Park Fire, which started June 9 from a lightning spark, is the second-largest and second-most destructive fire in Colorado state history. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

  • Maggie Baker (R) and her sister-in-law N

    Maggie Baker (R) and her sister-in-law Nellie Bowman walk through the remains of her brother-in-law's home which was burnt to the ground in the High Park Fire, June 30, 2012 in Bellvue, Colorado west of Fort Collins. The inferno burned more than 87,000 acres and left one person dead and destroyed 259 homes. The High Park Fire, which started June 9 from a lightning spark, is the second-largest and second-most destructive fire in Colorado state history. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

  • Maggie Baker looks at items retrieved fr

    Maggie Baker looks at items retrieved from the remains of her brother-in-law's home which was burnt to the ground in the High Park Fire, June 30, 2012 in Bellvue, Colorado west of Fort Collins. The inferno burned more than 87,000 acres and left one person dead and destroyed 259 homes. The High Park Fire, which started June 9 from a lightning spark, is the second-largest and second-most destructive fire in Colorado state history. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

  • Maggie Baker visits the remains of her b

    Maggie Baker visits the remains of her brother-in-law's home which was burnt to the ground in the High Park Fire, June 30, 2012 in Bellvue, Colorado west of Fort Collins. The inferno burned more than 87,000 acres and left one person dead and destroyed 259 homes. The High Park Fire, which started June 9 from a lightning spark, is the second-largest and second-most destructive fire in Colorado state history. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

  • Frank Baker visits the remains of his br

    Frank Baker visits the remains of his brother's home which was burnt to the ground in the High Park Fire, June 30, 2012 in Bellvue, Colorado west of Fort Collins. The inferno burned more than 87,000 acres and left one person dead and destroyed 259 homes. The High Park Fire, which started June 9 from a lightning spark, is the second-largest and second-most destructive fire in Colorado state history. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

  • A charred animal trailer sits amidst the

    A charred animal trailer sits amidst the destruction caused by the High Park Fire, in Bellvue, Colorado west of Fort Collins June 30, 2012. The High Park Fire burned more than 87,000 acres and left one person dead and destroyed 259 homes making it the second-largest and second-most destructive fire in Colorado state history. The High Park Fire is 97 percent contained while the Waldo Canyon Fire, which has burned more than 17,000 acres, left at least two people dead and destroyed 346 homes is 45 percent contained. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

  • A fireplace is all that remains of a hom

    A fireplace is all that remains of a home burnt to the ground in the High Park Fire, in Bellvue, Colorado west of Fort Collins June 30, 2012. The High Park Fire burned more than 87,000 acres and left one person dead and destroyed 259 homes making it the second-largest and second-most destructive fire in Colorado state history. The High Park Fire is 97 percent contained while the Waldo Canyon Fire, which has burned more than 17,000 acres, left at least two people dead and destroyed 346 homes is 45 percent contained. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

  • A scorched pathway leading to a home des

    A scorched pathway leading to a home destroyed by the High Park Fire, is seen June 30, 2012 in Bellvue, Colorado west of Fort Collins. The High Park Fire burned more than 87,000 acres and left one person dead and destroyed 259 homes making it the second-largest and second-most destructive fire in Colorado state history. The High Park Fire is 97 percent contained while the Waldo Canyon Fire, which has burned more than 17,000 acres, left at least two people dead and destroyed 346 homes is 45 percent contained. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

  • An item recovered from a home destroyed

    An item recovered from a home destroyed in the High Park Fire, June 30, 2012 in Bellvue, Colorado west of Fort Collins. The inferno burned more than 87,000 acres and left one person dead and destroyed 259 homes making it the second-largest and second-most destructive fire in Colorado state history. The High Park Fire is 97 percent contained while the Waldo Canyon Fire, which has burned more than 17,000 acres, left at least two people dead and destroyed 346 homes is 45 percent contained. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

  • A home surrounded by burnt land stands u

    A home surrounded by burnt land stands undamaged after the High Park Fire, in Bellvue, Colorado west of Fort Collins June 30, 2012. The High Park Fire burned more than 87,000 acres and left one person dead and destroyed 259 homes making it the second-largest and second-most destructive fire in Colorado state history. The High Park Fire is 97 percent contained while the Waldo Canyon Fire, which has burned more than 17,000 acres, left at least two people dead and destroyed 346 homes is 45 percent contained. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

  • Dragons Eye

    <a href="http://www.huffingtonpost.com/social/kcr56rck"><img style="float:left;padding-right:6px !important;" src="http://s.huffpost.com/images/profile/user_placeholder.gif" /></a><a href="http://www.huffingtonpost.com/social/kcr56rck">kcr56rck</a>:<br />Eye Of The Dragon (High Park Fire from Fort Collins Colorado)

  • High Park Wildfire

    Fire burns behind homes north of Poudre Canyon in the Glacier View area near Livermore, Colo., on Friday, June 22, 2012. The fire is burning on more than 68,000 acres west of Fort Collins and has destroyed at least 189 homes (AP Photo/Ed Andrieski)

  • High Park Wildfire

  • High Park Wildfire

    Fire burns behind homes north of Poudre Canyon in the Glacier View area near Livermore, Colo., on Friday, June 22, 2012. The fire is burning on more than 68,000 acres west of Fort Collins and has destroyed at least 189 homes (AP Photo/Ed Andrieski)

  • High Park Wildfire

    A slurry bomber drops retardant on the High Park wildfire after it crossed to the north side of Poudre Canyon and threatened homes in the Glacier View area near Livermore , Colo., on Friday, June 22, 2012. The fire is burning on more than 68,000 acres west of Fort Collins and has destroyed at least 189 homes (AP Photo/Ed Andrieski)

  • High Park Wildfire

    The sun sets behind a plume of smoke from the High Park wildfire near Livermore , Colo., on Friday, June 22, 2012. The fire is burning on more than 68,000 acres west of Fort Collins and has destroyed at least 189 homes (AP Photo/Ed Andrieski)

  • Image via <a href="http://www.facebook.com/photo.php?fbid=10151219758154638&set=p.10151219758154638&type=1&theater" target="_hplink">Facebook</a>.

  • Image via <a href="http://www.facebook.com/photo.php?fbid=3273738644328&set=p.3273738644328&type=1&theater" target="_hplink">Facebook</a>.

  • High Park Wildfire

    A firefighting helicopter races to dump a load of water on the fire north of Poudre Canyon in the Glacier View area near Livermore, Colo., on Friday, June 22, 2012. The fire is burning on more than 68,000 acres west of Fort Collins and has destroyed at least 189 homes (AP Photo/Ed Andrieski)

  • High Park Wildfire

    Shirley Paskett, left, and her partner Pam Creech react as they listen to a reverse 911 call telling them to evacuate their home after the High Park wildfire crossed to the north side of Poudre Canyon in the Glacier View area near Livermore, Colo., on Friday, June 22, 2012. The fire is burning on more than 68,000 acres west of Fort Collins and has destroyed at least 189 homes (AP Photo/Ed Andrieski)

  • High Park Wildfire

    Shirley Paskett loads her stuffed bob cat into her vehicle after she and her partner were evacuated from their home after the High Park wildfire crossed to the north side of Poudre Canyon the Glacier View area near Livermore, Colo., on Friday, June 22, 2012. The fire is burning on more than 68,000 acres west of Fort Collins and has destroyed at least 189 homes. (AP Photo/Ed Andrieski)

  • High Park Wildfire

    A firefighting aircraft is dwarfed by a plume of smoke north of Poudre Canyon in the Glacier View area near Livermore, Colo., on Friday, June 22, 2012. The fire is burning on more than 68,000 acres west of Fort Collins and has destroyed at least 189 homes (AP Photo/Ed Andrieski)

  • High Park Wildfire

    Fire burns behind homes north of Poudre Canyon in the Glacier View area near Livermore, Colo., on Friday, June 22, 2012. The fire is burning on more than 68,000 acres west of Fort Collins and has destroyed at least 189 homes (AP Photo/Ed Andrieski)

  • In this June 19, 2012 photo provided by the Colorado National Guard, an aircraft drops a load of fire retardant slurry above the High Park wildfire about 15 miles west of Fort Collins, Colo. The ammonium phosphate dropped from airplanes to slow the spread of raging wildfires can turn a pristine mountain stream into a death zone for trout and some say the retardant has never been proven effective. (AP Photo/Colorado National Guard, John Rohrer)

  • In a photo made on Tuesday, June 19, 2012, and made available on Wednesday by the Colorado National Guard, firefighters from the Monument, Colo., fire department march to dinner at sunset in a base camp near the High Park wildfire about 15 miles west of Fort Collins, Colo.(AP Photo/Colorado National Guard, John Rohrer)

  • In this June 19, 2012 photo provided by the Colorado National Guard, an aircraft drops a load of fire retardant slurry above the High Park wildfire about 15 miles west of Fort Collins, Colo. The ammonium phosphate dropped from airplanes to slow the spread of raging wildfires can turn a pristine mountain stream into a death zone for trout and some say the retardant has never been proven effective. (AP Photo/Colorado National Guard, John Rohrer)

  • Burned trees stand on the south side of Poudre Canyon where the High Park wildfire devastated the west of Fort Collins, Colo., on Wednesday, June 20, 2012. The largest Colorado blaze west of Fort Collins was 55 percent contained and has destroyed at least 189 homes since it was sparked by lightning June 9. (AP Photo/Ed Andrieski)

  • High Park Wildfire

    The stairs that led to a home that was destroyed by the High Park Wild fire are photographed during a tour by fire officials in Poudre Canyon west of Fort Collins, Colo., on Wednesday, June 20, 2012. The largest Colorado blaze west of Fort Collins was 55 percent contained and has destroyed at least 189 homes since it was sparked by lightning June 9. (AP Photo/Ed Andrieski)

  • The stairs that led to a home that was destroyed by the High Park Wild fire are photographed during a tour by fire officials in Poudre Canyon west of Fort Collins, Colo., on Wednesday, June 20, 2012. The largest Colorado blaze west of Fort Collins was 55 percent contained and has destroyed at least 189 homes since it was sparked by lightning June 9. (AP Photo/Ed Andrieski)

  • High Park Wildfire

    A burnt cactus stands near a home that was destroyed by the High Park Wildfire are pictured during a tour by fire officials in Poudre Canyon west of Fort Collins, Colo., on Wednesday, June 20, 2012. Areas with other homes destroyed were not included in the tour. (AP Photo/Ed Andrieski)

  • Burned trees stand on the south side of Poudre Canyon where the High Park wildfire devastated the west of Fort Collins, Colo., on Wednesday, June 20, 2012. The largest Colorado blaze west of Fort Collins was 55 percent contained and has destroyed at least 189 homes since it was sparked by lightning June 9. (AP Photo/Ed Andrieski)

  • In this photo made on Monday, June 18, 2012, and made available Wednesday by the Colorado National Guard, a helicopter drops a load of water above the High Park wildfire, about 15 miles west of Fort Collins, Colo.. The fire already has destroyed at least 189 homes since it was sparked by lightning June 9. (AP Photo/Colorado National Guard, Jess Geffre)

  • In this photo made on Monday, June 18, 2012, and made available Wednesday by the Colorado National Guard, a helicopter drops a load of water above the High Park wildfire, about 15 miles west of Fort Collins, Colo. The fire already has destroyed at least 189 homes since it was sparked by lightning June 9. (AP Photo/Colorado National Guard , Jess Geffre)

  • In this photo taken on Monday, June 18, 2012, and made available Wednesday by the Colorado National Guard, a helicopter drops a load of water above the High Park wildfire, about 15 miles west of Fort Collins, Colo. The fire already has destroyed at least 189 homes since it was sparked by lightning June 9. (AP Photo/Colorado National Guard , Jess Geffre)

  • High Park Wildfire, Slurry Bomber

    A slurry bomber files through smoke as it circles to make a drop on the High Park wildfire near Livermore, Colo., on Tuesday, June 19, 2012. The fire already has destroyed at least 189 homes since it was sparked by lightning June 9. Incident commander Bill Hahnenberg said it could be weeks or even months before it's finally controlled. (AP Photo/Ed Andrieski)

  • High Park Wildfire

  • High Park Wildfire

    A spotter plane, top, catches up to a slurry bomber to lead it on a drop on the High Park wildfire near Livermore, Colo., on Tuesday, June 19, 2012. The fire already has destroyed at least 189 homes since it was sparked by lightning June 9. Incident commander Bill Hahnenberg said it could be weeks or even months before it's finally controlled. (AP Photo/Ed Andrieski)

  • High Park Wildfire

    Smoke rises beyond a pasture as the High Park wildfire continues to burn out of control near Livermore, Colo., on Tuesday, June 19, 2012. The fire already has destroyed at least 189 homes since it was sparked by lightning June 9. Incident commander Bill Hahnenberg said it could be weeks or even months before it's finally controlled. (AP Photo/Ed Andrieski)

  • High Park Wildfire

    Fire burns in the forest on the High Park wildfire near Livermore, Colo., on Tuesday, June 19, 2012. The wildfire has burned over 180 homes. (AP Photo/Ed Andrieski)

  • High Park Wildfire

    A helicopter lifts off after taking on water to drop on the High Park Fire west of Fort Collins, Colo., on Monday, June 18, 2012. The wildfire has now burned about 90 square miles and destroyed more than 180 homes. (AP Photo/Ed Andrieski)

  • High Park Wildfire

    Smoke billows from the High Park Fire west of Fort Collins, Colo., on Monday, June 18, 2012. The wildfire has now burned about 90 square miles and destroyed more than 180 homes. (AP Photo/Ed Andrieski)

  • High Park Wildfire

    A helicopter lifts off after taking on water to drop on the High Park Fire west of Fort Collins, Colo., on Monday, June 18, 2012. The wildfire has now burned about 90 square miles and destroyed more than 180 homes. (AP Photo/Ed Andrieski)

  • High Park Wildfire

    Smoke billows from the High Park Fire west of Fort Collins, Colo., on Monday, June 18, 2012. The wildfire has now burned about 90 square miles and destroyed more than 180 homes. (AP Photo/Ed Andrieski)

  • High Park Wildfire

    Smoke billows from the High Park Fire west of Fort Collins, Colo., on Monday, June 18, 2012. The wildfire has now burned about 90 square miles and destroyed more than 180 homes. (AP Photo/Ed Andrieski)

  • High Park Wildfire

    The sun sets amidst smoke from the High Park Fire near Bellvue, Colo., on Monday, June 18, 2012. The wildfire has now burned about 90 square miles and destroyed more than 180 homes. (AP Photo/Ed Andrieski)

  • High Park Wildfire

    Fire crowns in the trees on the High Park wildfire near Livermore, Colo., on Tuesday, June 19, 2012. The wildfire has burned over 180 homes. (AP Photo/Ed Andrieski)

  • High Park Wildfire

    Fire burns in the forest on the High Park wildfire near Livermore, Colo., on Tuesday, June 19, 2012. The wildfire has burned over 180 homes. (AP Photo/Ed Andrieski)