After two days of dangerously hot and humid temperatures, relief is finally on the way for Chicago. The record-breaking heat index of 120 degrees Fahrenheit set at O'Hare International Airport on Thursday will give way to lower temperatures and decreased humidity on Friday. According to the NBC 5 Storm Team, highs on Friday will be in the mid-to-upper 80s, with some areas potentially reaching close to 90 degrees to the south. Along the lake, temperatures are expected to remain in the 70s.

Although Friday may still feel muggy, the dewpoints will not be as high as earlier in the week. Forecast models show a low chance of isolated storms Friday afternoon and into the evening, which may bring some relief from the heat. However, these storms could also become strong to severe, with a threat of locally strong winds and hail.

In addition to the potential storms, a high swim risk is in effect at Lake Michigan beaches on Friday and Saturday, with waves of three to five feet and hazardous rip currents expected. Despite the expected cooling off in the Midwest this weekend, high heat and humidity will persist in the South into next week.

The recent heat wave, caused by a "heat dome" or ridge of high pressure, has resulted in power outages, school cancellations, and multiple temperature records being broken. Climate change is believed to be a contributing factor to the increased likelihood and severity of heat waves. Stay hydrated and take necessary precautions to beat the heat during these extreme weather conditions.