A heat advisory was issued this week as indices are expected to reach triple digits.
The advisory will be in effect Monday noon through Wednesday 8 p.m. and was issued for La Salle, Grundy, Kankakee and Livingston counties in Illinois, as well as Newton and Jasper in Indiana.
Officials said heat indices are expected to peak in the afternoon, reaching between 105 and 109 degrees.
People are advised to drink plenty of water, stay in air conditioning and out of direct sunlight, and watch relatives and neighbors.
The Centers for Disease Control and Prevention have given the following recommendations for avoiding heatstroke:
- Wear lightweight, light-colored, loose-fitting clothing
- Stay in the air conditioning as much as possible
- Reduce exercise in the heat
- Try to limit your outdoor activities to cooler times, such as morning and evening hours
According to the latest forecast models, Monday will see highs in the 80s, near 90 degrees, and partly sunny skies with a few isolated showers.
Those warm temperatures will rise further on Tuesday as highs hit the 90s. Starting this weekend, the heat index on Tuesday could be in the 100s.
Another hot and humid day is expected on Wednesday with highs back in the 90s and a heat index in the low 100s.
However, Chicagoans might be feeling a bit off by the end of the work week. Generally sunny, Thursday will see highs in the upper 80s, forecast models predict.