The extreme heat and choking wildfire smoke blanketing wide swaths of the United States this summer are actively dangerous to heart health, a new study reports.

Days where soaring heat combines with fine particulate air pollution can double a person's risk of a fatal heart attack, researchers have found.

"Heat wave exposure interacts synergistically with fine particulate pollution t...

It's hot out there. If you're working out outdoors this summer, take precautions.

"If you plan to exercise in the heat, know your fitness level, take frequent breaks, wear proper clothing, wear sunscreen, avoid hottest times of the day and hydrate, hydrate, hydrate,"said Melanie McNe...

Your body needs vitamin D, the "sunshine" vitamin, but too much time in the sun can increase your risk for skin cancer.

An expert offers tips for boosting vitamin D intake while staying safe from the sun and this summer's record-high temperatures.

"Vitamin D is important for bone health, calcium absorption, reduction of inflammation, promoting cell growth and immune and cardiovascu...

Dehydration brings lots of risks -- including urinary tract infections (UTIs).

An expert offers some tips for avoiding these painful infections without sacrificing summer fun.

"Patients can experience more UTIs during the summer due to inadequate fluid intake, especially in the historic heat waves we've been experiencing,"said

As extreme heat continues to blanket numerous parts of the United States, Americans with dementia may be particularly challenged.

"Triple-digit temperatures and heat indexes are especially dangerous for someone with a dementia-related illness such as Alzheimer's disease, because the effects of dementia can impair their ability to notice if they are developing heat stroke or dehydrati...

Record-breaking heat waves are pummeling the United States and the world, causing many to wonder how much of this a body can take and still survive.

The limit is somewhere between 104 and 122 degrees Fahrenheit if you're sitting perfectly still, according to a small study conducted in the United Kingdom.

Researchers say they are starting to hone in on the high temperatures that...

Heat waves that hit the triple digits, like the ones now gripping many parts of the United States this week, can create dangerous conditions for folks who are vulnerable.

One vulnerable group is people with Alzheimer's disease or dementia, who may not realize they're developing heat illness. But caregivers can take steps to keep them safer.

"Triple-digit temperatures and heat indexe...

Enjoy that summer sun, but keep some safety tips in mind, the American Academy of Pediatrics (AAP) advises parents.

"It's great to see children enjoying nature and reaping the benefits of outdoor activities,"Atlanta-based pediatrician Dr. Rebecca Philipsborn said in an AAP news re...

Heat illness can be deadly, so it's essential to recognize the warning signs and know what to do as the summer season gets into gear.

"Heat illness tends to happen when the body is unable to regulate its temperature due to overexertion or extended periods of time in high temperatures,"said Dr. Maria Carmenza Mej...

Extreme heat can be dangerous, but you can stay cool and safe this summer if you take the right precautions.

The American Academy of Orthopaedic Surgeons (AAOS) offers some tips for doing so.

"No matter your age, it is critical to be able to recognize the signs of heat-related illness,"said

Children are uniquely vulnerable to the effects of climate change, a new report from the U.S. Environmental Protection Agency (EPA) shows.

Climate change can affect learning, physical health and housing security, which can last throughout the child's life, according to the report.

"Understanding health risks to children is critical for developing effective and equitable strategies ...

Heat waves may be killing prisoners in Texas, according to an analysis that found far-higher-than-normal death rates in the state's non-air-conditioned prisons.

"The majority of Texas prisons do not have universal air conditioning,"noted lead study author Julie Skarha. "And in these settin...

Climate change could spell trouble for those with heart failure, a new study suggests.

When the temperatures soared in France during the summer of 2019, the heat wave appears to have worsened the conditions of heart failure patients, researchers report.

"The finding is timely, given the heat waves again this year," said study a...

Internet hotheads are often literally that, with hateful tweets rising in number as temperatures soar, a new study reports.

Temperatures higher than 86 degrees Fahrenheit are consistently linked to heavy increases in online hate messages, according to a review of more than 4 billion English-language tweets.

The researchers identified a "feel-good window"between 54 and 70 degrees whe...

Life-threatening heat waves will become more common by the end of this century, according to a new study.

A "dangerous"heat index -- what the temperature feels like when humidity and air temperature are combined -- is defined by the National Weather Service (NWS) as 103 degrees Fahrenheit. NWS defines "extremely dangerous"as 124 degrees F -- unsafe to humans for any amount of time.

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With much of the United States baking in extreme heat this summer, older adults and the people caring for them need to take extra precautions.

Seniors can decline rapidly, sometimes within minutes, when exposed to soaring temperatures, said Dr. Angela Catic, an assistant professor at Baylor College of Medicine in Houston.

"As we get older, our bodies don't self-regulate temperature ...

As blistering temperatures blanket much of the country, more people are at risk heat exhaustion and potentially fatal