The U.S. Midwest and Ohio Valley, including Chicago and Cincinnati, face an enhanced, or level 3, risk of severe thunderstorms. That’s triggered numerous flood warnings and watches from Indiana into western Pennsylvania and Virginia, the National Weather Service said. On Monday, across the U.S., but mainly in the Ohio Valley and Mid-Atlantic, there were 347 filtered storm reports, the Storm Prediction Center said. La Guardia Airport had 273 flights scrubbed, while O’Hare International Airport near Chicago had 303, and Reagan National Airport had 190. As of 7 a.m. in New York, there were 112,815 homes and businesses without power in Ohio, West Virginia, Virginia, and Maryland, according to PowerOutage.com.