Feb. 20 (UPI) -- A man and a girl were killed in two separate avalanches in Utah in the past 24 hours, authorities said, as search teams in Northern California reported dangerous weather conditions are preventing them from recovering the bodies of recent backcountry victims. The three separate incidents have a combined death toll of 10 and one person unaccounted for due to avalanches that have occurred since Tuesday. The most recent victim was identified as a girl estimated to be between 10 and