SOUTH ROXANA — Flash flooding in South Roxana on Monday morning, June 8, 2026, was isolated to one intersection, Police Chief Bob Coles said late Monday morning, as authorities urged people to avoid the area until the water recedes.Coles said the flooding was at Madison Street and Sinclair Avenue, where a roughly 500-foot block of roadway was closed until the water subsides. He said both nearby retention ponds were full because of the torrential…