The heat wave is expanding into the Midwest, Northeast, and South

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  • Hotter than average temperatures extended into the Midwest and Northeast.
  • The upper Midwest and Northeast will see some relief by the end of this week.
  • The south will sweat over the coming days.

A heat wave will continue to grip the Midwest, Northeast and South to end the work week, which, coupled with high humidity, will bring temperatures to more than 100 degrees in some areas.

Heat alerts are in effect for tens of millions of people. The National Weather Service (NWS) has issued heat advisories, extreme heat warnings and watches for the Northeast, Midwest, Plains and South. This means that outdoor activities should be limited in these areas now and in the coming days due to the potential for heat-related illness.

New York City, Philadelphia and St. Louis are among the cities that have received extreme heat warnings.


Severe heat has reached the Midwest and Northeast. High temperatures are expected to range from the mid-90s to nearly 100 degrees in the Midwest, from Kansas, Nebraska and Missouri to Iowa, Illinois, Indiana, Kentucky and Ohio.

(Maps: Forecasts of highs and lows in the US for 10 days)

In the Northeast, highs will jump to the mid-90s from New York City to Washington, D.C., on Friday. Some daily record highs may be set.

Humidity will make the heat worse in some areas. The heat index will likely peak at more than 100 degrees in parts of the Northeast and Midwest during the afternoon.

The low will only drop into the 70s, and won’t provide much relief overnight. Several daily record lows will likely be set Saturday morning.

Heat relief arrives for some by the end of this week. Fortunately, the Midwest and Northeast will see temperatures drop due to a sweeping cold front moving through those areas Friday into Sunday. Highs could drop back into the 80s and upper 70s from Minneapolis to Chicago and New York.

The Deep South will also be very hot this weekend. Highs ranging from the middle to upper 90s to near 100 degrees will be common across the South through next week, from Texas and Oklahoma to the Carolinas. Temperatures will easily rise to over 100 degrees in the afternoon.

Be sure to take heat precautions if you have any outdoor plans in the area over the coming days.

Heat records have been smashed in the Southwest, but some modest cooling is coming soon. Even by the standards of the desert southwest, this heat wave is record-breaking. You can find a full summary of all the records set this month at this link.

This scorching heat will continue to impact the Southwest and the Great Basin through the end of this week, but temperatures will begin to drop toward average for this time of year by early next week.

Here’s how to stay safe: Hot conditions will be particularly dangerous for vulnerable groups, such as the sick and the elderly. The NWS has helpful thermal safety tips that can be incorporated into your daily routine when extreme heat sets in:

Work sites: Stay hydrated and take breaks indoors as much as possible.

-Inside: Check on the elderly, the sick and those who do not have air conditioning.

-In vehicles: Never leave children or pets unattended – look before you close the door.

-in the fresh air: Limit stressful activities and find shade. Drink plenty of water and avoid alcohol.

(more: 4 things extreme heat can do to your body)

This is the cause of heat expansion: A strong high pressure region in the upper atmosphere is the main cause of this heat wave. Elevation causes air to fall toward the ground, which compresses the air and makes it warmer.

In this case, the thermal dome extended from the southwest to the plains. Meanwhile, another hot dome of high pressure will form across the western Atlantic into the eastern states.

The result is the spread of excessive heat across a wide region of the plains into the Midwest, Northeast, and South.

The Weather Company’s primary journalistic mission is to report on breaking weather news, the environment, and the importance of science to our lives. This story does not necessarily represent the position of our parent company, IBM.

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