Hundreds of people working or playing outside – even those who seem healthy – succumb to heat-related illnesses each year.

For more on the dangers of extreme temperatures and key tips for dealing with the heat, Stephanie Sy speaks with Ashley Ward, director of the Heat Policy Innovation Hub at Duke University.

Typically, someone suffering heat stroke has exhausted their reserves of sweat and salt to stay cool, so sweating eventually stops during heat stroke. Their cognitive ability fails, and they ...

READ MORE: What to know about summer solstice, the longest day of the year Typically, someone suffering heat stroke has exhausted their reserves of sweat and salt to stay cool, so sweating ...

The first big heat wave of 2025 has arrived, coinciding with the official start of summer. More than 40 million people in the U.S. were under heat alerts Friday, according to the National Weather ...

Within those constraints, finding ways to stay hydrated and lower your body temperature are paramount. You can do this by ...

The first heat wave of the summer hit the Midwest earlier than usual this week, with a heat index forecast of up to 105 ...

From heat cramps to heat exhaustion to heat stroke, here's a look at preventable illnesses, and how you can keep cool and healthy. Here's what to know. What is extreme heat?

Heat illness symptoms can vary by person, Venkat said. Medications or underlying conditions can also make it harder to regulate body temperature or notice you’re getting too hot.

Heat doesn’t just mean canceled events. It also poses a health risk, especially for children, older people and those with certain health conditions. So here are some tips to stay safe.