A heat wave that brought oppressive temperatures to parts of the Southeast and Midwest is expected to continue into at least the early part of next week, threatening millions of Americans with dangerously high temperatures.
The U.S. flag flies in the middle of the day in downtown Seattle. The file is called "Ted S. Warren."
Over the past few days, much of the eastern half of the U.S. has been under an excessive heat warning or heat advisory.
There was some relief from the heat in the Ohio Valley on Saturday, but heat advisories were still in place in the Southeast and Midwest.
The mercury is expected to hit 100 degrees in Atlanta, Nashville and St. Louis in the coming days, setting new records.
Over the past week, all three cities set records.
Most of Texas is expected to continue its heat wave, with high temperatures of at least 100 predicted in Austin over the next week.
The National Weather Service said in an excessive heat warning bulletin that "drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors." Children and pets should not be left unattended in vehicles.
A high pressure system known as a "heat dome" is to blame for the high temperatures. After being parked over the Southwest, the heat dome caused record highs in Phoenix, Las Vegas and Death Valley. Millions of people are trapped under the heat dome as lows in many areas will not drop below 80 degrees.
In the Northeast, Great Lakes region and Pacific Northwest, temperatures are expected to be far below average. The highs in northern New England will be in the 40s.
There are more than 70 million bakes in the record breaking Southwest heat wave.
The western heat wave is spreading east.
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