Fourth of July weather forecast in US: “Potentially the hottest ever” as heat dome sends temperatures soaring above 100 degrees across multiple states

Fourth of July weather update: Millions across the eastern United States face dangerous heat this Fourth of July weekend, with temperatures potentially reaching 115 degrees Fahrenheit due to a heat dome. Forecasters warn of record-breaking highs and little overnight relief, impacting celebrations. Meanwhile, the West anticipates milder weather. Health experts urge caution during outdoor events as extreme heat poses significant risks.