Chicago, IL — The National Weather Service has replaced the Extreme Heat Watch with a Heat Advisory for all of northeast Illinois, including the entire Chicagoland area, as dangerously high temperatures and humidity are set to grip the region.
The Heat Advisory goes into effect at 10 a.m. Wednesday and will remain in place until 10 p.m. Thursday for most counties. However, DeKalb, McHenry, and LaPorte Counties will be dropped from the advisory earlier — at 10 p.m. Wednesday.
Forecast Highlights:
- Wednesday: A blast of heat and humidity arrives by midday, pushing heat index values into the upper 90s to near 100°F. By the afternoon, peak heat indices could hit a sweltering 105–110°F. Actual temperatures are expected to reach the mid 90s under partly to mostly sunny skies.
- Thursday: Another brutally hot day, with highs in the mid to upper 90s and heat index values again topping 100–110°F. Scattered showers and thunderstorms are possible later in the day, especially in the evening and overnight hours.
- Friday & Saturday: Still hot and humid, though slightly cooler, with highs in the mid to upper 80s. Expect scattered storms both days.
- Sunday: Drier and mostly sunny with temperatures climbing back to around 90°F.
- Next Week: The heat continues, with highs in the low 90s on Monday and upper 80s on Tuesday.
Safety Reminder:
Officials are urging residents to take heat precautions, including staying hydrated, avoiding strenuous outdoor activity, checking on vulnerable populations, and never leaving children or pets in parked vehicles.
Stay tuned to local forecasts and alerts as conditions could change rapidly.
