A heat wave expected to bring a stretch of hot temperatures the Chicago area hasn't seen in years began Thursday, bringing with it the potential for storms.
Video shows the forecast winds for this weekend's Race to Mackinac.
NBC 5's Andy Avalos gives us a look at the weather forecast.
An Excessive Heat Watch issued for the entire Chicago area this week has been upgraded to an Excessive Heat Warning.
The National Weather Service has confirmed one tornado touched down Sunday night as storm moved across northern Illinois.
Dangerous heat and humidity is on the way for the Chicago area later in the week.