Heatwave Alert: Severe Thunderstorms and Record-Breaking Temperatures Threaten Holiday Weekend

High heat and thunderstorms are expected across the United States on the Fourth of July, with potentially record-breaking temperatures in the Pacific Northwest and severe weather threats in the central and northern Plains. The western U.S. will continue to experience a heat wave, with scorching temperatures in northern California and western Oregon. Meanwhile, scattered severe thunderstorms are forecast for the central Great Plains, while the Northeast may see local downpours but improved conditions along the I-95 corridor.