A tightening heat dome over the central and western United States will drive extreme temperatures through Monday, exposing a large share of the population to high heat.
The deepest dome is forming over the Rockies and Plains, while heat advisories stay active for portions of southern Colorado and several Midwestern states.
Thunderstorms may pop up in scattered areas but will offer little relief from the stifling heat.
Forecasters warn the dome's intensity will stall cool fronts and push record-breaking conditions well into next week.
Residents are urged to keep water handy, limit outdoor exposure during peak hours, and look in on neighbors as the stretch of sizzling heat spreads across the nation's midsection.