Peoria, Illinois – Over 90 million Americans remain under heat alerts this week as a relentless, dangerous heat wave grips the Mid-Mississippi Valley and surrounding states, with no significant relief expected until after Sunday, July 27.
According to the National Weather Service’s Weather Prediction Center, the most extreme and persistent heat will stretch from the Lower Mississippi Valley through the Mid-South, peaking Tuesday through Thursday. Widespread temperatures in the mid to upper 90s, combined with oppressive humidity, will create a high risk of heat-related illness—especially in cities like Peoria, St. Louis, Memphis, and Little Rock.
Peoria and surrounding areas face a “Major” to “Extreme” HeatRisk this week. Little overnight cooling and consistently high humidity levels will compound the threat. Residents should avoid outdoor activities during peak afternoon hours, hydrate frequently, and check on elderly neighbors. Local cooling centers are available, and public health officials urge residents to seek shade or air-conditioned spaces.
This long-duration event mirrors historic heatwaves from previous decades and may push power grids and emergency services to their limits.
Heat warnings remain in effect through Sunday, and additional advisories may follow next week.
