A record-challenging heat dome is about to bake the West with the summer’s hottest temperatures so far

illuminem summarises for you the essential news of the day, reviewed by our editorial team. Read the full piece on CNN or enjoy below:

🗞️ Driving the news: An unusually strong heat dome is set to bring the hottest temperatures of the year so far across the western United States, with tens of millions of people facing extreme heat risks
• Forecasts indicate temperatures could rise 10 to nearly 20 degrees above seasonal averages from California to the northern Rockies, with dozens of records expected to be challenged across at least 12 states

🔭 The context: The heat dome is trapping hot air beneath a high-pressure system, intensifying temperatures across the region. Around 40 million people are currently under heat alerts, with more than 24 million facing major or extreme heat risk levels
• Cities including Phoenix, Las Vegas and Tucson are expected to exceed 110°F, while Death Valley could approach 126°F
• Scientists note that human-caused climate change is making heat waves more frequent, intense and longer-lasting

🌍 Why it matters for the planet: Extreme heat is accelerating climate impacts across ecosystems and human systems
• Higher temperatures increase wildfire risk by drying vegetation, intensify water stress through greater evaporation and place additional pressure on energy systems as demand for cooling rises
• The heat wave is also affecting the Colorado River Basin, where low snowpack and declining reservoir levels already threaten water supplies for millions of people

⏭️ What’s next: Forecasters projected the heat dome to persist, with additional extreme temperatures possible in early August
• Authorities are urging communities to prepare for prolonged heat exposure, especially for vulnerable populations without access to cooling

💬 One quote: “Heat at this level will affect anyone without access to cooling and hydration.” — National Weather Service

📈 One stat: Around 40 million people in the western United States are under heat alerts during the event.

Subscribe to our free newsletters to never miss a beat in sustainability.

The world needs sustainability knowledge. At illuminem, no interest group or shareholder can influence our work. Thank you for supporting our mission to make high-quality and independent sustainability information free for all. Every contribution helps. Thank you for donating today.