120 MILLION AMERICANS UNDER EXTREME HEAT WARNING AS HEATWAVE INTENSIFIES

A heatwave is intensifying across a large area of the United States this week, bringing extreme daytime temperatures, high humidity and elevated overnight heat, according to the National Weather Service. The NWS reported that approximately 120 million people nationwide are under an extreme heat warning as of Tuesday, with the timing coinciding with the Fourth of July holiday weekend. The heatwave is forecast to affect regions from the US east coast to central areas of the country. Peak temperatures are predicted to occur in the Midwest and Mississippi Valley through Thursday, before shifting eastward into the Ohio Valley and East Coast on Thursday and into the weekend.

Heat indices combining temperatures of 95F–105F (35C–40.6C) with high humidity are expected to reach 100F–115F (38C–46C) across affected areas. The NWS predicted that daily temperature records will be broken on Thursday and Friday, with some monthly and all-time records possible. To the north, much of Canada is experiencing its own heatwave beginning Tuesday, with temperatures up to 37C (99F) expected in Ontario. Officials warned residents in impacted areas to limit outdoor time, remain hydrated and ensure access to air conditioning or cooling centres.

New York City Mayor Zohran Mamdani activated a heat emergency plan with hundreds of cooling centres set to open across the city on Wednesday. Detroit, where temperatures could reach 100F (38C), opened a dozen recreation centres with air conditioning for residents. The intense weather may affect World Cup matches scheduled during the period, with some venues potentially experiencing heat indexes exceeding safety thresholds established by players' union Fifpro. The hottest conditions are predicted in Texas, though most impact on fans is expected to be limited by travel to and from air-conditioned stadiums in Houston and Arlington.