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As sweltering summer days become more common, the number of Americans who die of heat-related heart problems or strokes could soar over the next few decades, a new study projects.

The study -- published Oct. 30 in the journal Circulation -- estimates that by mid-century the United States will see thos...

Climate change is bringing diseases once considered tropical afflictions to the United States, and new research warns that a parasite spread by sand flies may be the latest to join this growing list.

The Leishmania parasite causes several forms of the disease leishmaniasis, including cutaneous leishmaniasis, which causes skin sores. Cutaneous leishmaniasis infects up to 1 million...

Yellow fever may be resurfacing in the United States, thanks to climate change.

The mosquito-borne viral illness decimated southern U.S. cities from 1820 to 1905, and now a new report says it could return to those areas.

One of the potential reasons for a yellow fever resurgence? Global warming, because mosquitoes love warm, wet weather.

Exactly where yellow fever...

While the hot, dry summer may have offered a break to people with some environmental allergies, that reprieve could be over.

Ragweed and mold are in the air this fall.

"This summer was good news for people who are sensitive to mold and pollen as there were little of those allergens in the air, but now that we're seeing more rain coming in after this drought, we're experiencing a big...

The signs of climate change are everywhere, from raging wildfires to flash flooding to soaring temperatures.

Now, a new study warns that things could get worse, with scientists reporting that even small increases in global temperatures will make some parts of the Earth too hot for humans to endure.

"As long as we continue to put greenhouse gases emissions into the atmosphere, we're...

People who experience flooding aren't just at risk during these severe weather events -- they also have a significantly higher risk of dying in the weeks that follow.

A new study by Australian scientists looked at a crucial window between three and six weeks after a flood.

The added ris...

Sweltering temperatures appear to fuel drug-related hospital visits, a problem that could be worsening with climate change, a new study suggests.

"We saw that during periods of higher temperatures, there was a corresponding increase in hospital visits related to alcohol and substance use, which also brings attention to some less obvious potential consequences of climate change,"said first...

Phoenix, already the hottest major city in the nation, experienced its most scorching summer on record this year, new data shows. And that will likely prompt the highest number of heat-associated deaths ever reported in the city in one year.

At this point, Maricopa County public health officials have confirmed 289 heat-associated deaths, the Associated Press reported. As of Sept....

As this summer has shown, the massive smoke plumes generated by wildfires can dirty the air of regions many miles away. Now a new study is raising the question of whether that pollution is contributing to suicides in rural America.

Researchers found a correlation between air pollution from "drifting" wildfire smoke and a rise in U.S. counties' suicide rates. The connection was not seen ev...

Hot weather can pose serious health risks for older adults.

Existing medical conditions, problems moving around and medications raise the risk of heatstroke, according to an expert at Rush University Medical Center in Chicago.

Being prepared can help prevent heat exhaustion and heatstroke.

"As we age, we become less efficient at noticing and adjusting to the heat,"geriatrics s...

Global warming has been linked to higher rates of asthma, heart disease and other health concerns. Now, new research suggests that rising temperatures across the planet may place pregnant women at greater risk for severe pregnancy-related illnesses, especially in their third trimester.

And this is likely to get worse in the near future, said study author