A third significant heat dome event is moving across the United States, affecting approximately 70 million people across southern and central regions. The system is expected to intensify over the weekend and extend into the following week, with temperatures ranging from 95 to 105 degrees Fahrenheit in most affected areas, while some southwestern desert locations could experience readings as high as 120 degrees Fahrenheit.
The persistent heat is being maintained by a high-pressure atmospheric system that acts to trap warm air over affected regions. The National Weather Service has issued an extreme heat warning for western Nebraska, where weekend temperatures may reach 108 degrees Fahrenheit. Meteorologists suggest the latest event could potentially set new temperature records in the Denver area.
This marks the third major heat dome to impact the country in recent weeks. An earlier event in early July forced cancellations of Independence Day celebrations in eastern states, while a subsequent heatwave brought record-breaking temperatures and 115-degree conditions to Montana. Scientists attribute the increasing frequency and intensity of such events to anthropogenic climate change resulting from the combustion of fossil fuels.
Heat represents the deadliest weather hazard in the United States, with particular risks posed by sustained nighttime temperatures and elevated humidity levels that prevent relief. Vulnerable populations including the elderly, pregnant individuals, young children, and those with pre-existing medical conditions face heightened health risks during extreme heat events. Separately, Europe is contending with severe heat phenomena, including large-scale wildfires in Spain and France that have displaced approximately 250,000 people, while 88 wildfires are currently being battled by firefighting crews across the US.
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