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Storm leaves 240,000 without power in U.S. Midwest

July 1 (Reuters) - More than 240,000 homes and businesses remained without power in the U.S. Midwest on Tuesday after severe thunderstorms rolled through the region overnight.

Commonwealth Edison, a unit of U.S. power company Exelon Corp, in northern Illinois said it had almost 200,000 customers still without power. The company said the storm affected about 380,000 customers.

The following lists outages by utility: Power Company State Out Now Exelon IL 197,100 Wisconsin Electric WI 28,300 Alliant IA 14,600 Ameren IL 2,800 Total 242,800 (Reporting by Scott DiSavino; Editing by James Dalgleish)