A building heat dome over the interior United States will drive oppressive temperatures through Monday, exposing a large share of the population to high heat.
The heaviest dome is setting up over the Rockies and Plains, while heat advisories persist for portions of southern Colorado and several Midwestern states.
Thunderstorms may pop up in scattered areas but will offer scant relief from the blistering heat.
Forecasters warn the dome's intensity will stall cool fronts and push record-breaking conditions right through next week.
Residents are urged to drink plenty of water, limit outdoor effort during peak hours, and watch out for vulnerable neighbors as the stretch of sweltering heat intensifies over the central half.