NEW : Sheriff urges residents to evacuate town because winds are expected to blow . Fire will take 12 hours to burn itself out . Officials are n't sure if one train derailed before the accident . Smoke can be seen in Phoenix , 20 miles away .
NEW : Sheriff urges residents to leave town because winds are expected to shift . Fire will take 12 hours to burn itself out . Officials are n't sure if one train derailed before the accident . Smoke can be seen in Fargo , 25 miles away .