Jet stream 'bulge' to trigger sweltering heat dome that will bring triple digit temperatures to 85m Americans

Daily Mail UK ^ | July 22, 2025 | CLAUDIA AORAHA

[Morgana]

A bulge in the jet stream across American skies is set to trigger an extreme heat dome this week - bringing triple-figure temperatures to large swathes of the country.

Nearly 85 million Americans, from South Dakota to Texas and North Carolina to Florida, are already experiencing the extreme heat warnings.

But the sweltering conditions are expected to intensify this week - causing temperatures to swell into the high 90s and surpass 100s in some areas.

Dallas and Kansas City are among the densely-populated urban areas where the heat index is expected to go above 100F, triggering a drought due to the lack of rainfall.

AccuWeather Senior Meteorologist Chad Merrill said: 'This has the look of a long-lasting heat wave with limited rainfall.

'Drought will expand through the central Plains by mid-August and worsen in Kansas and Nebraska, where there are already pockets of moderate to extreme drought.'

The heat wave could continue until the last weekend of July in the Plains and South, before the rising temperatures move westward towards the Rockies.

A heat dome is a high-pressure atmospheric system that causes warm air to be pushed to the Earth's surface - often becoming trapped for longer periods of time.

---

TOPICS: Weather
KEYWORDS: heatdome; summer

[Morgana]

drink lots of water you all.

[Carry_Okie]

It’s been “unseasonably pleasant” in California, all spring and summer so far.

[madison10]

I do not know if I can walk early enough to keep my dog alive. Maybe at 6 am.

[FlingWingFlyer]

And the undocumented, illegal alien invaders still refuse to go home.

[Magnum44]

Most of these bulges you hear about are air brushed....

[Rightwing Conspiratr1]

Trump’s fault. ;-)

[montag813]

Or, as scientists apparently call it, "Summer."

In July 1977 our parents took us to Washington D.C. to see the sights. It was 106 degree F that day. They didn't talk about "real feel" then, but it had to be well over 115 with that humidity.

[GeorgiaDawg32]

Short version:

It’s summer and it may get really hot..

[DouglasKC]

up. It’s hot out there. About like every summer in Kentucky.

[Blennos]

Here in central NC, no unusual heat for this time of year. But a lot of rain.

[kaktuskid]

In other words....it’s SUMMER!

[rktman]

Meanwhile in northern NV.....57 this a.m., currently 67 with a high forecast today of 82. And yes, plenty of hydrating anyway. Stay cool under the dome.

[George from New England]

Hate to mow an acre in Florida when it’s in the mid-90s but you mow when its not raining or wet. Can’t always be heaven.

[FreedomPoster]

Here in Georgia we call this phenomenon “Summer”.

[05 Mustang GT Rocks]

So far cooler and very pleasant summer in Central Texas.

[omni-scientist]

The article places undue emphasis on the heat "index", which is based on an algebraic formula whose intent it to tell you what it "feels like", not the actual temperature. The formula's coefficients are subject to modification from time to time, and are entirely subjective.

Granted, high-humidity makes high-temperatures more oppressive, but how that affects different people is not always the same.

[sphinx]

I’m pretty sure I’ve got some leftover covid masks somewhere in the bathroom closet, so I should be ok.

[Ronaldus Magnus III]

The predicted “high” today in Sacramento, Kalifornia is 77°.

SEVENTY SEVEN in JULY??????

Now that’s what I call Global Cooling.

[dragnet2]

76° now and it’s supposed to reach a high of 82 in my corner of Arizona.😎

[blackdog]

Atmospheric Rivers, Jet Stream Bulge, Arctic Blast, Heat Dome, Catastrophic Flooding, IOW, weather......Same as it ever was.