SAUGET - A hazardous materials fire prompted officials to order residents and businesses to shelter in place Wednesday morning, Aug. 12, 2026, in parts of Sauget, Cahokia Heights and East St. Louis, south of Missouri Avenue between South 50th Street and South 19th Street, before the order was lifted at 8:56 a.m., the St. Clair County Emergency Management Agency said.The agency said the fire involved trichloroisocyanuric acid, which it described …