Maps show where extreme humidity and 90- or 100-degree temperatures will affect around 255 million people across the United States.

Weather forecasters have warned of extreme and dangerous temperatures as a major heat wave sweeps across the central and eastern U.S. states.

A Midwest heat dome will bring worryingly high temperatures and stifling humidity to millions of people this weekend.

The designated cooling sites in Cleveland will be: Zelma George Neighborhood Resource and Recreation Center - 3155 Martin L. King Blvd. Collinwood Neighborhood Resource and Recreation Center - 16300 Lakeshore Blvd. Gunning Neighborhood Resource and Recreation Center - 16700 Puritas Ave.

Scorching temperatures and high humidity are a bad combo, especially when that's the forecast for three days in a row, making heat stroke a real possibility.

FOX 32's Mike Caplan breaks down today's weather outlook.

The first day of summer is here, and Mother Nature isn’t wasting any time serving up extreme heat across Northeast Ohio starting this weekend. Astronomical summer begins Friday at 10:43 p.m., and while conditions will be seasonable during the day and into the evening,

We’re getting closer and closer to the weekend…and closer and closer to a major summer heat wave in the Quad Cities. For now it’s an Extreme Heat Watch for this weekend for the Quad Cities, we’ll let you know when that gets changed over to an Extreme Heat Warning (most likely) or a Heat Advisory.