Overview
- Heat advisories and some extreme‑heat warnings remain in effect Sunday for broad swaths of the West, Southern Plains and mid‑Mississippi Valley with desert highs near 109–113°F and many inland areas in the 90s to low 100s.
- Health and emergency impacts are already occurring, including 35 people treated and 10 hospitalized for heat‑related illness at a Colorado Springs festival, and officials urge those without reliable cooling to limit outdoor activity.
- The Storm Prediction Center has placed parts of the Midwest and Dakotas at an elevated severe‑weather risk (level 2 of 5), forecasting damaging winds, hail, heavy downpours and isolated tornadoes with afternoon and evening storm clusters.
- Monsoonal moisture is increasing thunderstorm chances over the Sierra, deserts and mountains while the National Hurricane Center is tracking two Atlantic waves with roughly 20% and 40% seven‑day development odds.
- Wildfire smoke from Northwest fires is degrading air quality downstream, and forecast models show a possible midweek trough that could broaden storm coverage and bring cooling, though exact timing and local outcomes remain uncertain.