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Illinois Heat Wave: July 4th Forecast Risks
2 Jul
Summary
- Chicago expects 86°F with a 60% chance of showers after 1 p.m.
- Central Illinois may reach 91°F with a 50% chance of storms.
- Heat indexes across Illinois could peak between 99°F and 105°F.

An intense heat wave is gripping Illinois, with temperatures remaining in the triple digits throughout the week. As residents look towards Fourth of July celebrations, the National Weather Service has issued a forecast that includes a significant chance of rain and high UV indexes across the state.
In Chicago, the forecast for July 4th indicates partly sunny conditions with a 60% probability of showers and thunderstorms occurring mainly after 1 p.m. The high temperature is expected to be around 86 degrees Fahrenheit, with temperatures cooling to approximately 70 degrees Fahrenheit in the evening.
Central Illinois may experience mostly sunny weather with a high near 91 degrees Fahrenheit. Similar to Chicago, there is a 50% chance of showers and thunderstorms, primarily after 1 p.m. The heat index is projected to reach its peak between 99 and 105 degrees Fahrenheit around 3 p.m.
Throughout Illinois on the Fourth of July, the UV index will be high, prompting recommendations for residents to use sunscreen. The article also highlights that heat indexes are expected to peak between 99 and 105 degrees Fahrenheit depending on the specific location within the state.