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

St. Louis heatwave prompts Extreme Heat Warning, with risks of heat-related illnesses due to high humidity and temperatures.

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

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

The National Weather Service has issued an extreme heat watch for portions of northern and central Illinois from Wednesday ...

The National Weather Service in St. Louis has placed Franklin County under an Extreme Heat Warning through Thursday, 7 p.m.

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

The National Weather Service has issued an extreme heat warning for Southeast Missouri and Southwest Illinois, with heat ...

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

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

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

The extreme heat warning in effect since Monday has finally expired, but a heat advisory is still in place for the region ...