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Northeast Heatwave Hits 100°F, Sparks Event Cancellations

7/3/2026

Summary

NWS Warns Heatwave

The National Weather Service warned that a heatwave will keep temperatures near 100°F across the Northeast and that heat index could reach 115°F in Washington DC, Philadelphia and New York over the July 4 weekend.
Central Park recorded 100°F on Thursday, first triple-digit reading since 2012.
Events were altered as Boston moved its fireworks to 4 p.m. and Philadelphia shortened its parade, canceled a block party and delayed its concert because of heat.

Summary

Researchers: Heatwave Improbable

World Weather Attribution found the July heatwave would be virtually impossible without 1.4 °C (2.5 °F) of warming.
Researchers said the event would occur only once in thousands of years without fossil-fuel emissions.
A rare heat dome over the U.S. and southern Canada, amplified by climate change, makes Philadelphia and Miami matches unsafe.
Theodore Keeping and Friederike Otto warned the climate is fundamentally different and urged an immediate drawdown of greenhouse-gas emissions.

Summary

FIFA Shortens Festival

FIFA shortened Fan Festival hours in several host cities because of extreme heat.
Toronto health officer Michelle Murti warned “feels like” temperatures could reach 40 °C (104 °F) during Portugal’s Round of 32 match.
Dallas meteorologist Jennifer Dunn said pavement could hit 50 °C (122 °F) while air stays near 32 °C (90 °F).
FIFA’s heat protocol allows five substitutions, hydration breaks, three rest days and benches, while venues use roofs, AC or shade and misting.

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NWS Warns Heatwave

The National Weather Service warned that a heatwave will keep temperatures near 100°F across the Northeast and that heat index could reach 115°F in Washington DC, Philadelphia and New York over the July 4 weekend.
Central Park recorded 100°F on Thursday, first triple-digit reading since 2012.
Events were altered as Boston moved its fireworks to 4 p.m. and Philadelphia shortened its parade, canceled a block party and delayed its concert because of heat.

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