120°F and Climbing: 40 Million Americans Baking Under Another Heat Dome

This Is Not a Normal Hot Summer Weekend

The Guardian reports that heat indexes well above 100 degrees Fahrenheit are stretching from Minnesota down through Mississippi and west into southern California and Nevada. The National Weather Service says parts of the Southwest should brace for highs of 120 degrees Fahrenheit, which is not a temperature that sounds like something that should be happening on Earth in a place where people live.

This is day two of a heat dome, which is exactly what it sounds like: atmospheric conditions that trap heat and refuse to let it go, like a lid slammed down over half the country. Bob Oravec, a meteorologist with the National Weather Service, told The Guardian the core of the heat should sink southward by early next week. If you're in the south, congratulations, that's your problem now.

Temporary relief is expected in the central US around the middle of the week. But Oravec flagged that high temperatures could come roaring back by the weekend. So not so much a break as a cruel intermission.

What 'Extraordinarily Hot' Looks Like on the Ground

Pete Miller runs outreach for Threshold CoC, a homeless services network in Omaha, Nebraska. On Sunday his team was out passing water bottles to people in the streets. His description of conditions should be read slowly: "You stand outside for 30 seconds and you get drenched. And it's going to be like that all night."

That's not a metaphor. The humidity is doing something genuinely dangerous here, making the already brutal temperatures feel worse and stripping people's ability to cool down through sweat. Miller told The Guardian he's seeing people who are "exhausted, drained by the heat in a way that is really dangerous." These are people with nowhere air-conditioned to go.

Authorities are warning that children, older adults, and people with certain medical conditions face the highest risk of heat stroke and death. The advice from experts, as always, is to find air conditioning or a cooling center, drink water, and stay out of direct sun. Solid guidance, assuming you have access to any of those things.

The Heat Dome Bonus: Severe Storms Too

Because one catastrophic weather event apparently isn't enough, the moisture sitting on top of the heat dome is generating severe thunderstorms, flash flooding, and hail around the Great Lakes. Oravec explained the logic to The Guardian: "If you have a heat dome in one part of the country, you'll have a different corresponding weather in another part. It's all related."

Those severe storm risks are expected to push eastward in the coming days. So while the central US broils under historic dry heat, the eastern part of the country gets to look forward to a weather system that spent the week getting agitated over the Midwest before arriving at their door. Great system. Working as intended.

The Hottest First Half of a Year Nobody Wanted to Talk About

Here is the number that should be pasted on every wall in Washington: the continental United States just endured the second-hottest first half of any year on record in 2026, according to the National Centers for Environmental Information. Second hottest. Ever. In recorded history.

The Guardian's piece makes the connection that still somehow remains controversial in certain political offices: extreme heat events like this one are increased and made worse by the climate crisis, which comes from burning gasoline, oil, and coal. Not a theory. Not a debate. A physical process that scientists have understood for decades and that 40 million Americans are currently sweating through in real time.

Rapid City's all-time temperature record fell on Saturday. A Minnesota horse race was canceled. People are passing out water bottles in Omaha in the middle of the night. This is what a second-hottest first half of the year on record feels like when you're actually inside it.