Fire rages at Illinois chemical plant, residents ordered to shelterJan 11 (Reuters) - A chemical plant in northern Illinois went up in flames on Wednesday morning, sending up plumes of black smoke and prompting officials to advise nearby residents to shelter in place as emergency crews responded to the blaze.The fire broke out at the Carus Chemical Company complex in LaSalle, a city of less than 10,000 residents located about 100 miles southwest of Chicago.Fire crews were called to the scene at 9 a.m. after an explosion at the plant, and the ensuing blaze caused significant damage before it was contained, LaSalle Fire Chief Jerry Janick said at a news conference."Hats off to the fire department because I think a good portion of this blaze was knocked down within a good hour," LaSalle Police Chief Mike Smudzinski said.Carus produces an oxidant used to treat drinking and waste water, phosphates for corrosion control, and carbon capture products used for air purification, according to its website."