Tens of millions swelter as heatwave blankets the central and eastern US

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"Extreme Heatwave Affects Central and Eastern US with Record Temperatures"

Tens of millions swelter as heatwave blankets the central and eastern US analysis cover image The Guardian 8.7
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Original Article Source: https://www.theguardian.com/us-news/2025/jun/23/extreme-heat-warning-advisory
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TruthLens AI Summary

The National Weather Service (NWS) has issued multiple extreme heat warnings and advisories as a dangerous heatwave affects much of the central and eastern United States. This prolonged wave of high temperatures, coupled with high humidity, is expected to persist into the middle of the week. Over the weekend, several locations recorded their hottest temperatures of the year, with Salt Lake City, Utah, reaching 104°F (40°C) on Thursday, marking its first triple-digit reading of 2025. Similarly, Mitchell in South Dakota also hit 104°F on Saturday, breaking its previous daily record of 101°F (38.3°C). Other cities across Minnesota, Wyoming, and Michigan also reported daily high records, underscoring the widespread impact of this heatwave. Major cities under heat alerts include Chicago, Kansas City, St. Louis, Detroit, Cincinnati, Pittsburgh, Philadelphia, Washington D.C., and New York City, with the NWS categorizing some warnings as “extreme heat” due to the severity of conditions expected to be experienced throughout the affected regions.

As the heatwave progresses, cities like Boston, New York City, Philadelphia, and Washington D.C. are forecasted to approach or exceed 100°F (37.8°C), a level not reached in New York's Central Park since July 2012 and in Philadelphia since June 1994. The oppressive humidity exacerbates the situation, with heat index values, which account for humidity, expected to soar into the triple digits in parts of the Midwest, Great Lakes, Mid-Atlantic, and Northeast. In some areas, the heat index could reach as high as 115°F (46°C). Urban areas are experiencing night-time lows ranging from 70°F to 80°F (21°C to 27°C), providing little relief and increasing the risk of heat-related illnesses, particularly among vulnerable populations. In response to these conditions, New York City officials have urged residents to take precautions, emphasizing the seriousness of the situation. Philadelphia's health department has also declared a heat health emergency, urging the public to stay hydrated, limit outdoor activities, and check on vulnerable neighbors as the heatwave continues.

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Source URL: https://www.theguardian.com/us-news/2025/jun/23/extreme-heat-warning-advisory

The National Weather Service (NWS) has issued several extreme heatwarnings and advisoriesas a dangerous and prolonged wave of high temperatures and humidity blankets much of the central and eastern US, with the worst conditions expected to persist into the middle of this week.

Several locations recorded their hottest temperatures of the year over the weekend: Salt Lake City, Utah, hit 104F (40C) on Thursday, its first triple-digit reading of 2025, and on Saturday the city of Mitchell in South Dakota also reached 104F, surpassing its previous daily record of 101F (38.3C). Daily high records were broken in parts of Minnesota, Wyoming and Michigan.

Cities under active heat alerts include Chicago, Kansas City, St Louis, Detroit, Cincinnati, Pittsburgh, Philadelphia, Washington DC andNew YorkCity. The NWS classified some of its warnings as “extreme heat” alerts, its highest level, due to the severity of the conditions.

Some cities – including Boston, New York City, Philadelphia and Washington – could approach or surpass 100F (37.8C) during the peak of the heatwave. New York’s Central Park hasn’t reached that level since 18 July 2012, the NWS said, while Philadelphia last hit it in June 1994.

Humidity is also a factor, with oppressive moisture levels driving “heat index” values – which factor in humidity to give a sense of how hot it feels to a human – into the triple digits in part of the midwest, Great Lakes, mid-Atlantic and northeast. In some areas of the central US the heat index could reach as high as 115F (46C).

Meanwhile, night-time lows around 70F-80F (21C-27C) in urban areas will offer little relief and increase the risk of heat-related illness, particularly among vulnerable populations.

In New York City, officials are encouraging residents to take precautions. “This is the deadliest weather threat we face in New York City – treat it that way,” the city’s emergency management agency warned Saturday onsocial media. “Don’t wait until you feel sick. Heat builds. It compounds. It kills quietly.”

Philadelphia’s department of public healthdeclareda heat health emergency starting Sunday at noon.

Officials are urging the public to stay hydrated, limit time outdoors and check on elderly neighbors and others at risk as the heatwave persists.

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Source: The Guardian