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Dangerous US heatwave looms over 4 July holiday, World Cup and Swift wedding
BBC • • nation
Key Points:
- Millions across the US East Coast are experiencing dangerous heat and humidity, with temperatures expected to reach 38C (100F) and heat index values up to 115F in cities like Washington DC, Philadelphia, and New York during the 4 July weekend.
- Extreme heat warnings are in effect from the Midwest to the Northeast, with New York potentially seeing 100F for the first time in 12 years and Washington DC possibly facing four consecutive days of 100F heat.
- Authorities are advising residents to stay indoors and hydrated, with restrictions on public gatherings such as the US Capitol Police limiting attendance at a 4 July concert rehearsal due to heat concerns.
- The heatwave is driven by a persistent "heat dome" high-pressure system, exacerbated by drought conditions and dry soil, which intensify temperatures by reducing evaporative cooling.
- Climate change is contributing to more frequent and intense heatwaves, with temperatures expected to remain above average despite a slight drop forecasted after 4 July due to approaching cooler air and thunderstorms.
