Extraordinary heat in US Northeast arrives to clash with Fourth of July revelry

Multiday warnings of extreme heat landed in New York, Boston and Philadelphia on Wednesday as sultry weather pushed east just ahead of weekend Fourth of July celebrations in a region that revels in its role as a historic hub of U.S. independence.Temperatures in the high 90s Fahrenheit (30 degrees Celsius) were forecast for the Northeast; Philadelphia and Boston could top 100 by Thursday. Throw in humidity, and the real-feel heat index will be even higher at times, the National Weather Service said.A heat dome — high-pressure systems above a region that trap heat and humidity — has been smothering parts of the U.S., from the Midwest to the East Coast. It will add much discomfort amid 250th birthday parades, ship flotillas, outdoor concerts and, in Boston, a popular annual reading of the Declaration of Independence from a historic balcony.

New York Mayor Zohran Mamdani advised residents to stay cool inside and avoid “extraordinary temperatures.”“To be breaking into triple digits over the course of these many next days — it is of immense concern given that too often the heat is something that is underestimated,” Mamdani said.

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