A building heat dome over the nation's heartland United States will drive extreme temperatures through Monday, exposing a wide 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 stall cool fronts and push record-breaking conditions deep into next week.
Residents are urged to drink water often, limit outdoor exposure during peak hours, and keep an eye on older relatives as the stretch of sizzling heat builds throughout the country's interior.