Brutal Heat, Humidity, Dangerous Storms Target Illinois and Wisconsin

As we get closer to Fall, and turn the calendar over to September, we won't have autumn-like weather, at least for the next week, as a heat wave rolls into the Stateline area.

Heat Builds Across Northern Illinois

Summer isn't ready to let go of us just yet, so don't close your pool or put away your short pants because we're heading into a stretch of hot, humid weather.

The National Weather Service (NWS) is already issuing heat advisories and warning parts of Illinois about dangerous heat indexes that will reach 100 to 105 on Tuesday (9/1) and Wednesday (9/2), with even higher temps possible south of Interstate 80.

Rockford Could Feel Close to 100

The Rockford region will also be in the heat zone, with the NWS predicting heat indexes approaching 98 degrees on Tuesday and 99 degrees on Wednesday.

The extended forecast from the Weather Channel is showing a prolonged stretch of hot weather to begin September, with highs in the upper 80s to lower 90s through this upcoming weekend.

Thunderstorms Add Another Threat

The extreme heat won't be the only weather concern, with scattered showers and thudnerstorms are possible Tuesday afternoon, particularly north of the I-88/290 corridor.

Additional storm chances arrive later in the week, with the National Weather Service forecasting periodic opportunities for showers and thunderstorms through Friday.

Heat Advisory Issued

Heat advisories are posted across portions of the region, including areas covered by the National Weather Service offices serving northern Illinois and southern Wisconsin.

Officials warn that the combination of hot temperatures and high humidity can cause heat-related illness, so residents should limit outdoor activity during the hottest part of the day, stay hydrated, and make sure to check on vulnerable neighbors and family members.