Osborn says officials hope the fire lines hold during high winds expected later in the day.
Four houses have been burned or damaged, and hundreds of homes in Herriman remain evacuated.
/*Utah Army National Guard*/ Gen. Brian Tarbet took responsibility.
He says he's "deeply sorry" for what he calls a "systematic failure" that allowed live-fire training Sunday despite high wind warnings at the base 30 miles south of Salt Lake City.
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