The National Weather Service warned that heat index values are likely to exceed 100°F. "Dozens of record highs are expected ...

Dangerous heat could coincide with July 4 festivities as a heat dome pushes temperatures into the 90s and low 100s.

We could experience the hottest days of the year.

Hazardous weather conditions are leading officials in some states to limit fireworks use ahead of July 4 amid wildfire risks.