Observers on the opposite shore were forced to pull back when winds around 20 mph carried embers across the lake . NEW : Grass fire burns in Oklahoma City . A new study has found that the number of wildfires burning across the U.S. is on pace to increase by more than 50 percent over the next 20 years. High winds have whipped up the blaze west of Dallas-Fort Worth . Texas is up against the worst fire season in its history .
NEW : Grass fire burns in Oklahoma City . A new study has found that the number of wildfires burning across the U.S. is on pace to increase by more than 50 percent over the next 20 years. High winds have whipped up the blaze west of Dallas-Fort Worth . Texas is up against the worst fire season in its history .