The City of Philadelphia's Department of Public Health has declared a heat health emergency that will be in effect starting ...

On Wednesday, we're back in the upper 80s, feeling quite hot and steamy with a greater chance for storms, including a chance ...

Just in time for the start of summer on June 20, a heat wave is expected to scorch a large section of the United States, ...

Extreme humidity and heat will affect around 265 million people across the country this week. Maps show where and when to ...

The weather forecast for Philadelphia predicts a mix of cloudy skies, potential showers, and sunny spells for the week.

Temps may crack 100 for the first time in 13 years. The temperature made it to 91 on Saturday in Philly, and by the end of ...

It's hotter and more humid Sunday with temperatures climbing into the mid to upper 90s with heat indices above 100 degrees.

When summertime heat and humidity surge to unseasonably high levels, it can have dramatic effects on humans, animals, ...

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