More than 50 million people across the U.S. were under heat advisories on Saturday, with many under an excessive heat warning, as a summer of intense heat across the country shows no sign of relenting.

Woman drinking water

There is a heat wave in the US.

getty

Most of the people dealing with heat warnings were in the south.

The time was as of 4 pm. The mercury in larger cities was close to record levels, but cities like Waco, Texas, and Tupelo, Mississippi, had already set record highs.

At 4 p.m., Austin was 103 degrees, just short of its record of 104, while Dallas was 103.

Parts of central Nebraska and the desert southwest were under excessive heat warnings.

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Houston's National Weather Service office noted in a forecast discussion that this weekend will be even hotter than yesterday. The temperatures this weekend will be among the hottest so far this year.

What To Watch For

Texas and the Great Plains could get even hotter on Sunday with temperatures in the 90s in the southeast. On Sunday, Austin is expected to reach108.

stagnant air and suppressing cloud formation are caused by the latest "heat dome" of high pressure parking itself over the U.S. Dozens of cities have already set a new record high at least once this summer. Much of the US is expected to experience above-average temperatures into the fall. Climate change may be one of the earliest and most noticeable impacts of heat waves.

There are more than 70 million bakes in the record breaking Southwest heat wave.

There are record highs in over two dozen US cities.