by The United States have entered the highlight of the summer and a new heat dome – which seals in all of these hot, damp air – will make millions of people feel the same way.
Some cities could build their highest temperatures of the year from the south to the Midwest this week, while the air humidity drives the heat index or how hot it actually feels into the triple digits.
The sizzling conditions began to build from the golf coast to the levels on Tuesday, and more than 60 million people under heat warnings from Florida to South Dakota. In cities in these regions, including Memphis, Atlanta and St. Louis, the temperatures rose to the 90s by Tuesday afternoon.
Heat remains the most fatal form of extreme weather in the USA. Heat waves worldwide become more often, more serious and last longer because the world warms up climate change due to the fossil fuel stall.
The heat will rise intensively and expand to the middle west on Wednesday. The brutal temperatures extend from the south to the middle west on Thursday and also begin to push into the east.
On Wednesday and Thursday, the new hottest days of the year in cities such as Chicago, St. Louis and Memphis, Tennessee: Chicago and St. Louis could be that they will climb into the upper 90s for both days, while Memphis could flirt with triple digits.
In contrast to the intensive heat wave at the beginning of this summer, this attack of suffocating heat will probably overthrow hundreds of plates. However, the records do not have to fall that heat is incredibly dangerous: a level 3 of 4 heat risks extends from the golf coast to Minnesota on Tuesday, and the bags along the Mississippi Valley and the Golf coast are under a level 4 of 4 “extreme” risks that will be lingering in some places by Thursday.
Heat these serious effects on any non -effective cooling or proper fluid intake, not only population groups in need of protection, according to the National Oceanic and Atmospheric Administration. And for those without air conditioning it can remain fatal in the hottest parts of the day, warns the agency. For those at the highest risk, the heating is reinforced because it is only relieved a little to overnight.
The level 3 of 4 heating risks will be expanded on Wednesday to cover more via the Mississippi valley and the middle west, including up to Michigan’s upper peninsula.
The heat index – also known as the apparent temperature – will increase this week for the dangerous level for millions of millions.
The thermal ideas rose to the three -digit numbers over the south and parts of the central levels on Tuesday. The temperatures felt up to 110 degrees along the coast of Georgia and South Carolina in the afternoon.
By Wednesday, some parts of the Mississippi Valley, including Memphis, could have a heat index between 110 and 115 degrees.
Moist conditions also prevent the temperatures from cooling down significantly overnight. In St. Louis, it could still be almost 80 degrees on Thursday – almost 10 degrees higher than a typical low deep in July. In Chicago, low temperatures are expected in the upper 70s on Thursday morning, a departure from the typical lows in the 1960s for this time of year.
If the overnight temperatures do not cool enough to offer relief in overheated bodies, people have a higher risk of heat -related diseases. The nightly temperatures take the toughest hits from climate change and warm up faster than the daily highs.
The heat will be raised considerably in parts of the Ohio Valley on Thursday and reach northeast. Detroit, Cleveland and Cincinnati could come to the hottest day of the year with the expected heights in the 1990s within a certain degree. These heights are about 10 degrees hotter than in this hottest month of the year.
The most intense warmth for the east coast will arrive until Friday, with high temperatures in the middle to upper 90s and a heat index of 100 degrees or more for Washington, DC, Philadelphia, New York City and Boston. High temperatures in this area are also hotter up to 10 degrees than for these cities.
Climate change makes the heat wave this week for almost 160 million people, almost half of the US population, compared to a world without emissions of fossil fuels, at least three times more likely, as can be seen from the Climate Research Non -Profit Climate Central.
The heat dome will be replaced on Saturday for many, replaced by typical, although still very roasted temperatures at the end of July.
Here is how hot this summer was so far
For many in the adjacent US -UNs, June to August began since meteorological summer. The majority of the heat focused on the east, where dozens of locations have been up to date for their hottest summer so far.
At the moment, many more places are currently experiencing at least one of their ten Hottest Summers. The northeast, mid-Atlantic, Ohio Valley and Midwest were all verbatim hotspots.
The temperature ranking of the summer to-date temperature is valid from July 17, 2025
Instead of spending the daily temperatures that drive the above-average heat in these places, many, many cases of to weapons over at night, which have the greatest influence, as can be seen from a CNN analysis of data from the NOAA clerk center of the NOAA.
So far, the levels have changed this really hot summer. Much of the West also has a few exceptions: Seattle has so far the most fifth warm summer, while Portland floats the sieve highest.
In the United States there are only a few tiny bags with cooler summers, but the San Francisco Bay Area in California is one of them. Parts of the Bay Area – including Oakland and Fremont – experience one of their coolest summer to this day.
According to the recent forecast of the climate forecast, August will probably be another hot month for a large part of the country for a large part of the country. Cities that already bake could continue their hot stripes, while other places that have escaped the worst could warm up a little in the last part of the summer.
Luke Snyder from CNN contributed to this report.
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