SAUGET/EAST ST. LOUIS - Shortly after 12:44 a.m. Wednesday, Aug. 12, 2026, emergency responders from multiple counties were called to a reported chemical fire at a facility along Sauget Industrial Drive in Sauget, Illinois, where officials later identified the hazardous material involved as trichloroisocyanuric acid and issued shelter-in-place notifications because of a visible chemical plume.St. Clair County Emergency Management Agency Director Herb Simmons said the response quickly developed i...