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[HEALTH] · United States · 100 sources

Part of situation: US Heat Wave and Flood Risks Persist (110 clusters)

US heat wave forces July 4 event cancellations and strains power grid

heat wave July 4 cancellations power grid strain heat‑related deaths World Cup heat impacts

A high‑pressure “heat dome” settled over the eastern United States in early July, pushing temperatures above 100 °F in cities such as Washington DC, New York, Philadelphia and Boston. Heat‑index values approached 115 °F, breaking or tying daily records across the Mid‑Atlantic and Northeast.

The extreme heat contributed to at least 22–25 heat‑related deaths, with New Jersey reporting 22 fatalities, Pennsylvania confirming a death from heat exhaustion, and Illinois and Mississippi each noting a casualty. State health officials warned that many victims were found in homes without air‑conditioning.

Public celebrations for the nation’s 250th Independence Day were heavily disrupted. Washington’s annual Independence Day parade was cancelled for the first time, the Great American State Fair on the National Mall was temporarily closed, and parades in Philadelphia, Haddon Township (NJ) and other locales were called off. Severe thunderstorms later forced evacuations from the Mall, though fireworks eventually proceeded.

The heat also strained electricity supplies. PJM, the regional grid serving 67 million customers, issued emergency conservation orders as demand surged. Con Edison reported roughly 17,000 customers without power, and utility outages affected over 900,000 customers across several states.

World Cup matches scheduled for the weekend were affected as well. FIFA introduced mandatory hydration breaks for games in Philadelphia and Miami, where officials expected heat indexes of 100 °F or higher. French coach Didier Deschamps noted, “It was very hot, and it certainly affected us,” referencing similar conditions from a prior tournament.

Health agencies, including the CDC, issued alerts urging people to stay hydrated, seek shade, and monitor for signs of heat illness. New York Mayor Zohran Mamdani urged residents to “stay cool, stay vigilant and check on your neighbors.”

Sources

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25 days ago
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22 days ago
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25 days ago
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25 days ago
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Record-Breaking Overnight Heat Relentlessly Bakes the East Coast [southfloridareporter.com]
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Severe heatwave in the US - some states cancel Independence Day celebrations [telegrafi.com]
22 days ago
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NYC fireworks under thunderstorm threat as scorching temps bring flash floods [www.themirror.com]
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23 days ago
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25 days ago
Finding freedom from the heat on July 4th will be a challenge in eastern US [www.whec.com]
22 days ago
President Trump's Great American State Fair postponed as Northeast heat wave continues [www.wishtv.com]
23 days ago
US bakes in historic heatwave heading into July 4 holiday [wsau.com]
25 days ago
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26 days ago
米国「ヒートドーム」現象で気温３８・９度、建国２５０年行事は時短・中止相次ぐ…熱中症リスク１・８億人 | ヨミドクター(読売新聞) [www.yomiuri.co.jp]
23 days ago
Philadelphia officials say plans are in place for July 4 crowds and extreme heat [6abc.com]
25 days ago
Brutal US heatwave disrupts Fourth of July celebrations [7news.com.au]
23 days ago
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23 days ago
Ola de calor azota el este de EE. UU. y amenaza el fin de semana festivo del 4 de julio [www.expreso.ec]
24 days ago