High temperatures linked to increased heart risks, study finds

As record-setting heat strikes the eastern U.S., new research shows that exposure to heat waves significantly raises the risk of cardiovascular problems, according to new research.

Victoria St. Martin reports for Inside Climate News.


In short:

  • The study, published in JAMA Cardiology, reviewed 500 observational studies on high temperatures and extreme weather's impact on heart health.
  • Researchers found cardiovascular risks increase with prolonged heat exposure, especially in cooler regions without widespread air conditioning.
  • Wildfires and extreme weather events like hurricanes elevate cardiovascular disease risks long after the initial events.

Key quote:

“I think we can advance the conversation on climate change. If we point out to people that there are these effects on cardiovascular health, cardiovascular disease is not theoretical or something that is going to happen in the future. This is here and now.”

— Dhruv S. Kazi, associate professor at Harvard Medical School

Why this matters:

The research highlights a stark correlation between heat waves and a surge in cardiovascular issues, including heart attacks and strokes. Vulnerable populations, such as the elderly and those with pre-existing health conditions, are particularly at risk. The findings emphasize the need for better public health strategies to protect these groups during extreme heat events.

North Carolina State Capitol building
Copyright: SeanPavonePhoto/Big Stock Photo ID: 95422091

Republican’s oil ties a focus in North Carolina Senate race

Former Republican National Committee Chair Michael Whatley has a long record in the energy industry. Democrats see it as a liability.
Two workmen installing rooftop solar panels

Rooftop solar is in a slump. Are dark days ahead?

The popularity of residential solar is seeing a steep reversal due to shifting state and federal policies driven by powerful utility interests. And while some say the decline is simply a mild adjustment, others fear the market for residential solar may be on the brink of a long-term slide.   
A hurricane damaged house with a man talking on the phone in front of it.
Credit: Leonard Zhukovsky/Big Stock Photo

In the midst of Florida’s insurance crisis, what recourse do residents have?

An Inside Climate News analysis shows the state’s insurance crisis is hitting hardest in the disadvantaged counties of Florida’s agricultural heartland. Residents here, in large part, are bearing the burden themselves.
Chicago city art installation

US cities use art, shade and education to beat the heat

Cities across the U.S. are combining art with shade to shield people from rising temperatures and educate them about our warming world.
Small uninhabited South Pacific island with a dozen palm trees
Photo by Buddy AN on Unsplash

China, climate crisis and Cop31: five takeaways from the Pacific Islands Forum

A key climate crisis funding treaty struck as Pacific leaders backed Australia’s bid for Cop31 despite some criticism of its environmental credentials
A river flowing between dry rocky bluffs

Experts warn Colorado River crisis demands immediate water cuts across the West

With reservoirs at less than one-third capacity, researchers say the Colorado River could reach dangerously low levels after another dry winter unless the federal government and seven Western states act quickly to reduce water use.

An air conditioning unit mounted on a wall.

A/C saves lives during heat waves. Will Los Angeles require it for rentals?

With extreme heat intensifying due to climate change, Los Angeles Councilmember Eunisses Hernandez is pushing for a citywide indoor temperature threshold that would require landlords to provide renters with cooling options.

From our Newsroom
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

One facility has emitted cancer-causing chemicals into waterways at levels up to 520% higher than legal limits.

Regulators are underestimating health impacts from air pollution: Study

Regulators are underestimating health impacts from air pollution: Study

"The reality is, we are not exposed to one chemical at a time.”

Pennsylvania governor Josh Shapiro speaks with the state flag and American flag behind him.

Two years into his term, has Gov. Shapiro kept his promises to regulate Pennsylvania’s fracking industry?

A new report assesses the administration’s progress and makes new recommendations

silhouette of people holding hands by a lake at sunset

An open letter from EPA staff to the American public

“We cannot stand by and allow this to happen. We need to hold this administration accountable.”

wildfire retardants being sprayed by plane

New evidence links heavy metal pollution with wildfire retardants

“The chemical black box” that blankets wildfire-impacted areas is increasingly under scrutiny.

Stay informed: sign up for The Daily Climate newsletter
Top news on climate impacts, solutions, politics, drivers. Delivered to your inbox week days.