A heat dome is expected to bring dangerously high temperatures to the south-western United States through the end of August and into early September, according to the National Weather Service (NWS). Surging temperatures are forecast to affect more than 45 million people, with daytime highs ranging from 110 to 115°F (43-46°C) and limited cooling relief overnight.

The NWS described the situation as an "abnormal hazardous heat" event, with daytime highs of 100-110°F across the Southern Plains and up to 115°F in parts of the southwest. The agency warned that heat-related illnesses may increase, especially among those without adequate hydration and cooling options.

In response, some cities, including Los Angeles, have announced plans to provide access to cooling centers for residents seeking relief from the heat.

Experts predict that some temperature records could be tied or broken this month. The NWS categorizes the heat risk as "Extreme HeatRisk," indicating a danger to people lacking proper hydration and cooling capacity.

The heat dome coincides with ongoing wildfires in the region, compounding the health and safety risks. The organization No Heat Stroke reported that 34 children died in hot cars across the US in 2025, with cases occurring as late as December in parts of the south.

Climate change is cited by the US scientific journal the Proceedings of the National Academy of Sciences as increasing the frequency and severity of summer extreme weather events in the Northern Hemisphere, including heatwaves, heavy precipitation, flooding, droughts, and wildfires.

Sources