According to the National Weather Service, a third of the U.S. population will face heat advisories on Tuesday and Wednesday as a week of record-breaking temperatures continues.
A “heat dome” is expected to bring triple-digit temperatures to parts of the Midwest, adding to the early starting temperatures already baking the Southwest.
From California to Virginia, about 100 million Americans have heat advisories, heat warnings, or heat watches.
St. Louis reported a record 100 degrees on Monday and the heat index in parts of the Midwest approached 115 degrees.
From Raleigh, North Carolina, to Chicago, actual temperatures are expected to reach nearly 100 degrees on Tuesday.
As extreme heat continues in the Southwest and Midwest, the heat is moving east, and Detroit is expected to reach 97 degrees on Wednesday.
Wildfires continue in the southwest amid the heat, igniting due to gusts of wind and very dry conditions.
There are red flag warnings in Colorado, New Mexico, Texas and Oklahoma of increased fire hazards.
Another heat wave is about to hit the Southwest on Wednesday, with temperatures exceeding 110 degrees from Southern California to Arizona.
Winds are expected to continue, extending the risk of wildfires in the Southwest.
More than 27 major cities broke or broke like-minded heat records on Saturday, with Death Valley in California the hottest place in America at 123 degrees.
Palm Springs, California and Phoenix followed, with temperatures of 114 degrees, marking the hottest day for Phoenix in a century.
Las Vegas reported temperatures of 109 degrees on Saturday for the first time since 1956.
Extreme heat causes more deaths in America than any other weather-related disaster, with the Environmental Protection Agency estimating that more than 1,300 deaths a year in the US are due to extreme heat.
Warning signs of a heat episode include nausea, excessive sweating, and a rapid pulse.
Those most at risk for a heat-related incident are young children, older adults, pregnant women, and immunocompromised individuals.
Whenever possible, the NWS encourages residents to take cool showers or baths, seek out swimming pools to escape the heat, avoid daytime physical activity and high heat hours, and find a safe, air-conditioned area.