forecasters said on Wednesday. Severe thunderstorms on Wednesday are also likely across portions of the Upper Midwest, while parts of the Southwest will see more excessive heat on Thursday.
More than 100 million people were expected to be affected by the heat wave and authorities warned residents to stay hydrated, remain indoors when possible, and be aware of the health risks of high temperatures.
Strong storms brought heavy rain and damaging wind to many of the affected areas on Monday, and nearly 300,000 customers remained without power by Wednesday afternoon, including more than 200,000 in Ohio, according to PowerOutage.us.
Excessive heat warnings and heat advisories remained in effect on Wednesday from Michigan to northern Florida, according to the National Weather Service.