Update 4:50 p.m. with comments from Mo. Nat. Guard Maj. Tammy Spicer. Updated 2:43 with Missouri disaster declaration. Updated 9:56 a.m. April 19 with Missouri, St. Louis information. Updated at 4 p.m. April 18 with Ameren substation information.
Illinois Governor Pat Quinn has declared a state of emergency following significant flash and river flooding in his state.