A building heat dome over the mid-section United States will drive extreme temperatures through Monday, exposing a substantial share of the population to high heat.
The strongest dome is taking shape over the Rockies and Plains, while heat advisories remain in effect for portions of southern Colorado and several Midwestern states.
Thunderstorms may pop up in scattered areas but will offer scant relief from the oppressive heat.
Forecasters warn the dome's intensity will slow cool fronts and carry record-breaking conditions deep into next week.
Residents are urged to stay hydrated, limit outdoor activity during peak hours, and watch out for vulnerable neighbors as the stretch of extreme heat spreads throughout the nation's midsection.