"Record-breaking heatwave sweeps across the US, bringing extreme temperatures and live weather updates"

A severe and prolonged heat wave is nearing its peak across the southern and western states, with dangerously hot weather expected from Florida to Washington state. The most extreme temperatures are anticipated in the Desert Southwest, with Death Valley, Calif., possibly reaching 130 degrees Fahrenheit, Phoenix nearing 120 degrees, and California's Central Valley well above 110. The National Weather Service has warned of a major to extreme risk for heat-related illnesses, especially for those without effective cooling and hydration. Heat is the number one weather-related killer, and precautions such as staying hydrated, avoiding the sun, and checking on vulnerable individuals are advised. Additionally, the dangers of leaving young children and pets unattended in vehicles during hot weather are emphasized.