Cika wannan jumla: A 1993, Union Electric ya yi yaƙi da
Ambaliyar shekara 500 a yankin babban birnin St. Louis daga kogin Missouri da Mississippi. A cikin 1994, Union Electric ta raba kyautar Edison ta masana'antu tare da Midwest Power Systems, Inc., na Des Moines, Iowa, don aikinsu na ba da sabis na lantarki ga abokan ciniki yayin bala'in ambaliyar 1993.