Record-breaking heat dome expected to bring dangerous temperatures to US south-west

Key Points:

• A heat dome is expected to impact over 45 million people across the southwestern US through late August and early September, with daytime highs reaching 110-115°F (43-46°C) and limited nighttime cooling, according to the National Weather Service (NWS).
• The NWS warns of extreme heat risks, categorizing the conditions as dangerous for those without proper hydration and cooling, and advises limiting outdoor activities, staying hydrated, and checking on vulnerable populations such as older adults and children.
• In addition to heat, the region from Texas to California will experience monsoonal moisture causing scattered heavy showers and thunderstorms, which, combined with humidity, may increase heat-related health risks.
• Some cities, including Los Angeles, are opening cooling centers to help residents cope with the intense heat, while authorities emphasize the dangers of leaving individuals, especially children, unattended in closed vehicles.
• Researchers link the increased frequency and severity of such extreme heat events to climate change, highlighting its role in amplifying heatwaves, wildfires, droughts, and other extreme weather phenomena across the Northern Hemisphere.