What is a heat dome? The US heatwave explained
Summary
A strong heatwave caused by a weather pattern called a heat dome is expected to hit much of the central and eastern United States this week. Temperatures could feel as high as 115°F (46°C), with dangerous heat lasting through the Fourth of July weekend.Key Facts
- A heat dome is a high-pressure area that traps hot air close to the ground, making heatwaves stronger.
- The heatwave will affect many cities from the Great Lakes to the East Coast, including New York, Philadelphia, and Washington.
- Daytime temperatures will reach the high 30s Celsius (100s Fahrenheit), with humidity making it feel even hotter.
- Night temperatures will stay warm, in the 70s Fahrenheit, giving little relief from the heat.
- Over 60 million people are under heat alerts according to the National Weather Service.
- The hottest days are expected on Thursday and Friday but heat will continue into the next week.
- Some cities affected are also hosting FIFA World Cup events.
- Officials warn that the heat is dangerous for everyone, not just vulnerable groups.
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