Much of America is about to swelter under climate-fueled heat dome

Key Points:

• A massive and long-lasting heat dome is set to impact most of the contiguous United States starting this weekend, with temperatures 15 to 25 degrees Fahrenheit above normal, persisting for at least a week and potentially until the end of the month.
• The heat dome will trap hot air over a vast area, initially affecting the Northern Plains and potentially spreading coast-to-coast, leading to record-breaking triple-digit temperatures and more than 90 local temperature records being tied or broken, including dangerous overnight heat records.
• Experts highlight the severity of the heat wave due to its size, duration, and intensity, noting that hotter nighttime temperatures pose significant health risks and complicate wildfire management amid ongoing drought conditions.
• Climate change is identified as a key factor exacerbating the heat wave’s intensity and duration, with attribution science showing such extreme temperatures would be nearly impossible without human-caused global warming.
• The heat wave’s persistence is fueled by drought conditions reducing soil and air moisture, creating a feedback loop that intensifies heat and increases wildfire risks across affected regions.