A heat wave is forecast to hit the East Coast and the Midwest and last through at least Friday.
Almost 66 million people were under some level of heat alert yesterday afternoon. About 150 million people will experience temperatures above 90 degrees Fahrenheit.
Heat warnings, watches or advisories were in effect from Iowa to Maine, affecting Detroit, Cleveland, Cincinnati, Pittsburgh, Philadelphia, Boston, New York and other cities.
Records could be set in 200 cities from the Ohio Valley and the lower Great Lakes into the northern mid-Atlantic and the Northeast, according to the National Weather Service.