Evacuation orders remain in effect this morning as a fire still burns in northern Illinois after an explosion at a chemical plant.
The explosion sent a huge ball of fire and thick black smoke into the air.
The smoke could be seen as far as 100 miles away.
Emergency officials say it happened Monday morning at a Chemtool factory, the country’s largest grease manufacturer.
Investigators still don’t know what trigged the explosion, but all 70 employees working at the Chemtool plant made it out safely.
Everyone within a one mile radius of the plant in Rockton was ordered to evacuate.
Fire crews say the fire could burn for several days.
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