This summer's extraordinary heat is but a preview of what's to come: Humidity not only makes daytime highs more miserable, it extends the hotness through the night.

HERSHER: It's unusual. You know, this heat wave is more intense and just bigger than what we would usually see this time of year. A huge swath of the country is trapped under this heat dome.

Dangerous heat starts building across the tri-state area on Sunday and intensifies through the early part of next week. It'll be our first heat wave of this summer season -- and a brutal one, at that.

While this heat wave has been extraordinary in many ways, its birth and evolution followed a well-known sequence of events that generate heat waves. Heat waves occur when there is high air pressure at ...

When nighttime temperatures remain high during heat waves, your body can't recover from daytime heat stress, creating dangerous and potentially life-threatening conditions.

The June heat wave triggered warnings of a flash drought and caused a surge in ER visits. Many other countries have been facing extreme heat at the same time.

A public health researcher explains the signs someone is developing heat exhaustion or heat stroke, and what to do.

Summer in the Eastern half of the U.S kicked off with a massive heat wave, and the summer season is only just beginning. So how should you prepare your home and community for the next big heat wave?

The impacts of heat waves are not just limited to physical health, they also have far-reaching consequences on food availability, water resources and overall livelihoods. As we continue to experience ...

Climate change has been exacerbating heat waves, and the problem isn’t going away anytime soon. An increasingly hot planet — due largely to burning fossil fuels such as coal, oil and natural … ...

In the U.S., hundreds of people working or playing outside – even those who seem healthy – succumb to heat-related illnesses each year.