A severe heatwave has disrupted Fourth of July celebrations across the central and eastern United States, forcing cancellations of parades, concerts, and fireworks. Record-breaking temperatures, fueled by a "heat dome," have strained power grids and led to widespread heat alerts affecting over 185 million people. Officials are urging caution due to the dangerous conditions, with several cities experiencing extreme heat and power outages.

The nation is gripped in a dangerous heat dome. Threatening millions of people in the Midwest and Eastern United States.

Residents have been urged to slash their energy use as the heat wave bakes the eastern U.S.

High humidity is expected to make conditions feel even hotter