The thunderstorm that swept across Colorado's Front Range on Sunday afternoon, snapping trees and spitting lighting bolts, killed a 37-year-old woman riding horseback with a teenage family friend in Douglas County. The woman's large black horse was hit and died. The 15-year-old girl was fighting for life.

Douglas County paramedics at the scene — along an equestrian trail by a blackened oak tree on rolling terrain between Sedalia and Roxborough State Park — treated the girl, who then was taken to a hospital, sheriff's Deputy Jason Blanchard said. "She was conscious and breathing."

Lightning killed 38 people last year in the United States, National Weather Service data show.

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