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As it happenedended

Life-threatening temperatures swallow tens of millions across Midwest and East Coast

Schools across New York and the tristate area closed early as officials warned of oppressive conditions

Julia Musto
in New York
Monday 23 June 2025 18:39 BST
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Record Heat To Impact Midwest, East Coast This Week

Nearly 170 million Americans living across the central and eastern U.S. this week have been be forced to endure dangerous heat as city officials declared emergencies and schools announced early closures.

In upstate New York, it already as if it were more than 100 degrees at John F. Kennedy International Airport on Monday morning and thousands of customers were left without power following power outages.It is the last week of school for districts there, and many have switched to half-day schedules.

“These changes in schedule were made to ensure the health and safety of both students and staff and to minimize the potential for heat-related illnesses,” Central School District Superintendent Dr. Marie Wiles said in a statement.

Governor Kathy Hochul declared a state of emergency across dozens of counties in response to the rising temperatures. Down the East Coast, Philadelphia health officials declared a heat health emergency, urging people to look out for each other.

The cause of the triple-digit temperatures is a massive heat dome. AccuWeather warned it could lead to levels of heat and humidity not seen in June in many years.

"Bright sun and humid conditions will cause AccuWeather RealFeel Temperatures to peak above 100 degrees for millions,” warned AccuWeather meteorologist Jacob Hinson.

Dangerous heat is forecast from the Midwest to the East Coast. Here's where

Julia Musto23 June 2025 14:51

Some 170 million Americans to feel dangerous heat through mid-week

Kentucky and other central states will continue to feel temperatures in the mid-to-high 90s this week. In the East, it will get even hotter
Kentucky and other central states will continue to feel temperatures in the mid-to-high 90s this week. In the East, it will get even hotter (AP)

Tens of millions of Americans are forecast to feel the effects of dangerous heat through mid-week.

Many cities already saw triple-digit temperatures over the weekend.

Major cities, which already run hotter than the suburbs, could see such conditions for several days. There won’t be much relief overnight, forecasters warned.

Much of the central U.S. will feel highs in well into the mid-90s as a heat dome envelops much of America’s east.

"Vulnerable people, such as the elderly or young children, are most susceptible to heat-related illness," said AccuWeather Meteorologist Jacob Hinson. "Caution should be taken if spending any appreciable amount of time outside, such as by staying hydrated with non-alcoholic beverages, taking frequent breaks and seeking shade."

Julia Musto23 June 2025 14:58

'Ring of fire' pattern seen from satellites around heat dome

Julia Musto23 June 2025 14:59

Heat dome in photos: Life-threatening heat hits dozens of states

Children in Louisville, Kentucky, play in a park’s water feature. Heat index values there were forecast to exceed 100 degrees
Children in Louisville, Kentucky, play in a park’s water feature. Heat index values there were forecast to exceed 100 degrees (AP)
People protest in Louisville, Kentucky, as a worker hands out water. Staying hydrated is critical to staying safe in hot weather
People protest in Louisville, Kentucky, as a worker hands out water. Staying hydrated is critical to staying safe in hot weather (AP)
A tourist in New York City poses on Monday near hot steam on one of the hottest days of the year thus far. New York was under a state of emergency
A tourist in New York City poses on Monday near hot steam on one of the hottest days of the year thus far. New York was under a state of emergency (AFP via Getty Images)
A child in Louisville, Kentucky, splashes water on his face. The weekend also saw temperatures rise
A child in Louisville, Kentucky, splashes water on his face. The weekend also saw temperatures rise (AP)
Julia Musto23 June 2025 15:07

Is it heat exhaustion or heat stroke? Symptoms to look out for

Julia Musto23 June 2025 15:12

But, what is a heat dome? Here's what to know

Temperatures across the Midwest and East Coast will hit dangerous levels next week

Millions of Americans are expected to experience temperatures in the 100s next week

A heat dome occurs when a large area of high pressure in the upper atmosphere acts as a reservoir that traps heat and humidity, Ricky Castro, a National Weather Service meteorologist in Illinois, told The Associated Press.

Warm surface air beneath a heat dome can linger for several days or even weeks, threatening human health.

Extreme heat is the leading cause of weather-related fatalities in the U.S.

Julia Musto23 June 2025 15:15

How to stay cool: Here's what the experts say

Expert advice on how to stay cool and safe amid heat alerts

Heat poses a health risk, especially for children, older people and those with certain health conditions
Julia Musto23 June 2025 15:16

Air quality concern for much of the eastern U.S.

Air quality was shown to be a moderate level across dozens of states, according to IQAir.

An advisory was issued for ozone in New York. Ozone was also a concern in Philadelphia.

Julia Musto23 June 2025 15:25

The Big Apple opens cooling centers

Julia Musto23 June 2025 15:30

Do solar panels perform better in a heat wave?

Do solar panels perform better in a heatwave?

Longer days do mean more solar power since sunlight will be hitting your panels and generating power for more time
Julia Musto23 June 2025 15:36

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