A building heat dome over the nation's heartland United States will drive dangerous temperatures through Monday, exposing a significant share of the population to high heat.
The heaviest dome is forming over the Rockies and Plains, while heat advisories stay active for portions of southern Colorado and several Midwestern states.
Thunderstorms may fire up in scattered areas but will offer scant relief from the stifling heat.
Forecasters warn the dome's intensity will hold off cool fronts and sustain record-breaking conditions well into next week.
Residents are urged to drink water often, limit outdoor activity during peak hours, and keep an eye on older relatives as the stretch of extreme heat spreads throughout the central half.