The National Weather Service issued Extreme Heat Watches and Flood Advisories throughout Illinois. Here's the forecast.

Several central Illinois counties are under an Extreme Heat Watch, with NWS warning of "dangerously hot and humid conditions.

Dangerously hot conditions, with heat index values locally higher than 110 degrees, are expected. A Weather Impact Alert ...

St. Louis faces an Extreme Heat Warning with a high near 97°F and heat index values up to 107, along with potential severe ...

With extreme heat warnings in effect across major U.S. cities, officials urge residents to prioritize safety and hydration ...

At least 100 Americans are on alert for dangerous heat and humidity -- stretching from Texas to Maine -- on Friday.

Michigan, Wisconsin, Illinois, Indiana, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, Louisiana, and Alabama—with ...

NWS issues Extreme Heat Warning in St. Louis, advising precautions against high heat index values up to 116 degrees.

The media could not be loaded, either because the server or network failed or because the format is not supported.

Numerous states could see heat index values higher than those expected in Death Valley on Thursday, according to the NWS.

Millions of Americans are under weather advisories this week. See which major cities have heat, flood or storm advisories.