A long-running heat wave will persist, baking parts of the western United States with temperatures that will soar into the 100s and holding the East in its hot and humid grip throughout the week, forecasters said Sunday.
An excessive heat warning—the National Weather Service’s (NWS) highest alert—was in effect for about 36 million people, or about 10 percent of the population, said NWS meteorologist Bryan Jackson. He said he expected dozens of locations in the West and Pacific Northwest to tie or break previous heat records.
