Chicago area bracing for potentially dangerous heat wave

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The heat and humidity gripping the Chicago area could reach dangerous levels the next few days.

The heat index — what it feels like — is expected to reach 100 or higher Wednesday, Thursday and maybe Friday as we see the longest string of 90-degree days in more than 11 months.

Nighttime temperatures are not expected to drop much lower than the middle 70s, minimizing any opportunity for relief.

The National Weather Service has issued a hazardous weather outlook warning that the hot, humid air could spawn thunderstorms this afternoon with “brief torrential downpours and strong gusty winds.”

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