Springfield, Illinois – A dangerous stretch of heat will continue baking central Illinois through Thursday, with heat indices soaring as high as 106 degrees and scattered thunderstorms returning by midweek.
According to the National Weather Service in Lincoln, a Heat Advisory remains in effect for all of central and southeast Illinois. Afternoon heat index values between 100 and 106 are expected daily, especially from Sunday through Tuesday. High temperatures will range from 91 to 97 degrees, with limited overnight relief as lows stay in the 70s.
Cities like Springfield, Decatur, and Champaign are urged to limit outdoor activity during peak afternoon hours. On Tuesday, scattered storms could bring brief relief but also increase humidity and the potential for localized flooding. Wednesday and Thursday may see continued storm chances, with heat indices remaining in the 96–105 range.
Residents should stay hydrated, avoid strenuous activity during the day, and check on vulnerable neighbors. Power grids and cooling systems may be strained, especially during afternoon peak hours.
Hot, humid conditions are expected to persist through the week. Storms on Tuesday and beyond could prompt additional warnings or advisories.
🌡️ Five-Day Forecast for Central Illinois
- Today (Sunday): Breezy, sunny; Heat Index 100–106° | High: 93–97° | Low: 73–77°
- Monday: Mostly sunny; Heat Index 99–105° | High: 94–96° | Low: 73–76°
- Tuesday: Scattered storms; Heat Index 96–103° | High: 91–94° | Low: 72–76°
- Wednesday: Scattered storms; Heat Index 97–105° | High: 91–94° | Low: 73–76°
- Thursday: Scattered storms; Heat Index 96–105° | High: 91–94° | Low: 73–76°
