A massive explosion at a fertilizer plant on the edge of the town killed at least two people, wounded more than 150, leveled dozens of homes and prompted authorities to evacuate half their community of 2,800.
The Wednesday night blast shook houses 50 miles away and measured as a 2.1-magnitude seismic event, according to the United States Geological Survey.
"Fire officials fear that the number of casualties could rise as high as 60 to 70 dead, said Dr. George Smith, the emergency management system director of the city.
"That's a really rough number, I'm getting that figure from firefighters, we don't know yet," he said. "We have two EMS personnel that are dead for sure, and there may be three firefighters that are dead."