Maps show heat alerts as extreme temperatures threaten millions

A massive heat dome has gripped parts of the western U.S., prompting heat alerts for millions and raising concerns about extreme temperatures. This prolonged heatwave is now starting to move eastward, potentially affecting more states soon. Such intense and sustained heat poses serious risks to public health, emphasizing the urgent need for preparedness and measures to combat the impacts of climate change. The situation underscores the growing frequency of extreme weather events, a trend scientists link to global warming.