Heat dome expands across the central United States, creating dangerous conditions for millions

A heat dome is expanding across the central United States, affecting roughly 70 million people.

Temperatures are forecast to exceed 100 degrees Fahrenheit from Dallas to North Dakota, with highs up to 108°F in western Nebraska.

High humidity and warm overnight lows will prevent recovery, increasing heat stress.

The heat is expected to persist through the week, with possible temporary relief toward next weekend.

The Mid-Atlantic, Northeast, and Pacific Northwest are expected to avoid the extreme heat.