Health
CDC warns of extreme heat dangers amid ‘record-breaking high temperatures’
Many regions across the United States experienced “record-breaking high temperatures” in 2023 due to extreme heat, according to the Centers for Disease Control and Prevention (CDC).
Emergency room visits due to heat-related illness peaked in several regions in the U.S. and remained elevated for a prolonged duration compared to visits between 2018 and 2022, the agency’s recent Morbidity and Mortality Weekly Report noted.
More males went to the emergency room for heat-related illnesses than females – especially those between 18 and 64 years old.
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Americans are experiencing “longer, hotter and more frequent episodes of extreme heat,” the report states.
Is extreme heat a public threat?
“Extreme heat could be considered an invisible killer in so much as many people become exposed and vulnerable to its dangers quickly and often without warning,” Patrick McHugh, M.D., an emergency medicine physician at Cleveland Clinic Akron General in Akron, Ohio, told Fox News Digital.
Many regions across the United States experienced “record-breaking high temperatures” in 2023 due to extreme heat, according to the Centers for Disease Control and Prevention. (iStock)
Although McHugh said Americans “shouldn’t worry,” he emphasized the need to “be aware and prepared for the dangers of heat waves.”
An EPA spokesperson told Fox News Digital, “As average temperatures rise due to climate change, the risk of extreme temperatures, heat waves and record-breaking temperatures increases.”
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Here’s what to know about extreme heat and how to stay safe.
What is extreme heat?
“Extreme heat can be defined depending on a variety of factors, including location, weather conditions (such as cloud cover, humidity and temperature), and the time of year,” said an EPA spokesperson in an email.
It typically occurs when the weather is much hotter and/or more humid than average in a particular area, the agency added.
Emergency room visits due to heat-related illness peaked in several regions in the U.S. and remained elevated for a prolonged duration compared to visits between 2018 and 2022. (iStock)
While summertime temperatures of 100 degrees Fahrenheit might be normal for Phoenix, Arizona, for example — the same temperatures are considered extreme for Boston, Massachusetts.
“Where in the U.S. people are most susceptible to heat depends on what is normal for a given location and the type of infrastructure (such as access to air conditioning),” the EPA spokesperson noted.
“Extreme heat is becoming more common in places that have not historically experienced extreme heat … and don’t have the infrastructure to keep people cool, which has major consequences for health and safety.”
“Extreme heat could be considered an invisible killer … as many people become exposed and vulnerable to its dangers quickly and often without warning.”
A heat wave is typically defined as a “prolonged period of abnormally hot weather, usually lasting more than two days in a row,” the EPA spokesperson said.
Heat waves can occur with or without humidity.
The average global temperature has risen by more than 2 degrees Fahrenheit since the mid-1800s, according to McHugh.
Elderly adults, infants, individuals taking certain medications and people with disabilities are at greater risk of heat-related illnesses. (iStock)
“This results in greater extreme heat temperatures, increased variability in temperatures and an increase in the risk of heat illness,” he told Fox News Digital.
The EPA’s Heat Waves indicator, which monitors trends in heat waves for 50 cities across the U.S. over the past 60 years, shows that heat waves are occurring more often over a longer period of time — both in average number of days and season length — and are also becoming hotter over time.
Risk factors for extreme heat effects
Elderly adults, infants, individuals taking certain medications and people with disabilities are at greater risk of heat-related illnesses, according to McHugh, who has a specialty in wilderness medicine.
These individuals may not have adequate resources to escape the heat and protect themselves, he warned.
“Extreme heat is becoming more common in places that have not historically experienced extreme heat … and don’t have the infrastructure to keep people cool, which has major consequences for health and safety,” an EPA spokesperson said. (iStock)
“Many schools in northern parts of the U.S. do not have air conditioning, so when heat waves happen in May/June or [in] September, students and teachers can be at risk,” the EPA spokesperson noted.
Certain factors can also increase someone’s risk of developing a heat-related illness, including fever, dehydration, prescription drug use, alcohol use or sunburn, according to the CDC.
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Healthy people can be at risk if they engage in strenuous physical activity when it’s very hot outside — which means it’s important to balance activities with actions that cool the body to prevent heat-related illness, the EPA advised.
Certain settings — such as inside cars, construction worksites and homes with little to no air conditioning — can also put people at greater risk, according to the CDC.
Heat island effect
Some urban areas experience higher temperatures compared to outlying areas.
“Structures such as buildings, roads and other infrastructure absorb and re-emit the sun’s heat more than natural landscapes like forests and water bodies,” the EPA spokesperson said.
These highly concentrated areas, which have limited greenery, become “islands” of higher temperatures relative to outlying areas.
It’s important to balance activities with actions that cool the body to prevent heat-related illness, the EPA advised. (iStock)
“Daytime temperatures in urban areas are about 1 to 7 [degrees Fahrenheit] higher than temperatures in outlying areas, and nighttime temperatures are about 2-5 [degrees Fahrenheit] higher,” the agency noted.
People living and working in these areas are at higher risk of heat-related illness and death.
“Prolonged exposure to high temperatures is associated with increased hospital admissions for cardiovascular, kidney and respiratory disorders.”
As people lose control of their internal temperature amid extreme heat, they may experience a range of illnesses, including heat cramps, heat exhaustion, heat stroke and hyperthermia, according to the EPA.
“Prolonged exposure to high temperatures is associated with increased hospital admissions for cardiovascular, kidney and respiratory disorders,” the spokesperson said.
A particular setting can also place people at high risk, including inside cars, construction worksites and homes with little to no air conditioning, according to the CDC. (iStock)
Some 1,220 people die of heat-related illness every year in the United States due to extreme heat, per CDC estimates.
“Heat islands also increase energy demand for cooling, which can increase greenhouse gas emissions and air pollution and can be a financial burden for many people — particularly low- or fixed-income households,” the EPA spokesperson said.
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Everyone should have a plan in case of extreme heat, McHugh advised. “Either an air-conditioned home or building where shelter from the heat is easily available should be used.”
Extreme cold is dangerous, too
Those who counter climate change claims warn of extreme temperatures at both ends of the spectrum.
Most studies have shown that extreme cold causes about 10 times more excess deaths than extreme heat, according to William Happer, PhD, professor emeritus of physics at Princeton University in New Jersey and a prominent critic of climate extremism.
Most studies have shown that extreme cold causes about 10 times more excess deaths than extreme heat, according to a physics professor. (iStock)
A 2015 international study that analyzed deaths between 1985 and 2012 in 13 countries, including the U.S., found that most of the deaths due to adverse temperatures were attributable to cold weather.
The study, which was published in The Lancet, also revealed that most deaths were caused not by extreme temperatures, but by exposure to moderately hot and cold temperatures.
A more recent study published in The Lancet Planetary Health in 2021 found that for every death associated with heat, nine were connected to cold.
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“No one knows how much of the modest recent warming, around 1 [degree Celsius] over the past century, has been due to greenhouse gases and how much is natural,” Happer told Fox News Digital.
He estimates that less than half of the warming is from increasing greenhouse gases.
“Whatever the cause, observations clearly show that there has been very little change in daily high temperatures,” Happer noted.
A more recent study published in The Lancet Planetary Health in 2021 found that for every death associated with heat, nine were connected to cold. (Credit: Fox News)
“The warming is almost all due to warmer minimum temperatures at night and in the winter.”
Compared to lives lost due to the extreme heat, the warming should have saved more lives that would have been lost because of the extreme cold, he said.
For local heat and health information, the EPA spokesperson recommended using the CDC’s Heat and Health Tracker.
Americans can also visit their local National Weather Service (NWS) Forecast Offices for real-time heat-related warnings.
Fox Weather can also be consulted on a regular basis for up-to-date weather information and news.
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There has been a shake-up in the Make America Healthy Again movement regarding glyphosate, a widely used herbicide that has been the subject of significant controversy.
The debate follows an executive order signed by President Donald Trump that ensures an adequate supply of elemental phosphorus and glyphosate-based herbicides related to national defense.
MAHA supporters have previously pushed a pesticide-free agenda, warning of potential health harms caused by glyphosate.
Dr. Marc Siegel, Fox News senior medical analyst, said he believes there is sufficient evidence linking glyphosate to neurodegenerative diseases, including ALS, Parkinson’s and multiple sclerosis, to warrant limiting exposure.
President Donald Trump signed an executive order that ensures an adequate supply of elemental phosphorus and glyphosate-based herbicides related to national defense. (AP Photo/Charlie Neibergall)
“With Parkinson’s, this association appears to be due to the gut, vagus nerve and brain axis, where the exposure affects the microbiome in the gut, which then ascends slowly up to the brain, causing the neurodegenerative disease years later,” Siegel told Fox News Digital.
“There is also a growing association being found between high-dose glyphosate or occupational exposure and metabolic disorders, liver disease and some cancers, specifically lymphoma.”
He added, “Growing research backs this. I favor limiting it.”
“When we apply them across millions of acres and allow them into our food system, we put Americans at risk.”
Studies have shown that glyphosate, which is used in products such as Roundup, owned by Monsanto, could raise cancer risk.
In one University of Washington study published in the journal Mutation Research, researchers found that exposure to it increased the risk of non-Hodgkin lymphoma by 41%.
The nonprofit Investigate Midwest, which analyzed data from both the U.S. Geological Survey and the National Cancer Institute, also recently found that pesticides may contribute to cancer rates.
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Among the top 500 counties for per-square-mile pesticide use, more than 60% had cancer rates above the national average of 460 cases per 100,000 people, according to the report.
Investigate Midwest, which is based in Illinois, interviewed more than 100 farmers, environmentalists, lawmakers and scientists as part of a partnership with the Pulitzer Center’s StoryReach U.S. Fellowship.
Among the top 500 counties for per-square-mile pesticide use, more than 60% had cancer rates above the national average of 460 cases per 100,000 people, according to one study. (iStock)
Iowa, which used 53 million pounds of pesticides last year, holds the nation’s title for second-highest cancer rate.
Bill Billings, a resident of Red Oak, Iowa, was diagnosed with cancer in 2014.
“The cancer specialist said, very directly, (my) cancer is a result of being exposed to chemicals,” Billings said in the report.
Kelly Ryerson, founder of Glyphosate Facts and owner of the Instagram account @glyphosategirl, told Fox News Digital her journey researching the herbicide began with her own health struggles.
Ryerson, who is based in California, previously struggled with chronic illness and autoimmune issues, which she said improved when she stopped eating gluten.
Iowa, which used 53 million pounds of pesticides last year, holds the nation’s title for second-highest cancer rate. (iStock)
After attending a medical conference at Columbia University’s Celiac Disease Center, Ryerson began to question modern farming practices rather than the gluten itself.
“A lot of times, farmers are spraying Roundup on our grains right before harvest to facilitate an easier harvest,” she said. “After that easier harvest, because everything’s dry at the same time, those crops go directly to the mill and may end up in our food supply, at alarmingly high levels.”
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In 2015, the International Agency for Research on Cancer (IARC), part of the World Health Organization framework, classified glyphosate as “probably carcinogenic to humans.”
The classification was based on limited evidence of cancer in humans (notably non-Hodgkin lymphoma in some studies) and sufficient evidence in experimental animals.
“President Trump’s executive order reinforces the critical need for U.S. farmers to have access to essential, domestically produced crop protection tools, such as glyphosate,” a Monsanto spokesperson said. (Wolf von Dewitz/picture alliance via Getty Images)
A spokesperson for Monsanto told Fox News Digital it will comply with Trump’s order to produce glyphosate and elemental phosphorus.
“President Trump’s executive order reinforces the critical need for U.S. farmers to have access to essential, domestically produced crop protection tools, such as glyphosate,” the spokesperson said.
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HHS Secretary Robert F. Kennedy Jr. has long been a vocal critic of Roundup, working with his legal team in 2018 to award $289 million to a man who alleged the weed killer caused his non-Hodgkin lymphoma, according to reports.
Following backlash to Trump’s executive order, Kennedy said he supports the order but acknowledged that “pesticides and herbicides are toxic by design, engineered to kill living organisms.”
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“When we apply them across millions of acres and allow them into our food system, we put Americans at risk,” he posted on X. “Chemical manufacturers have paid tens of billions of dollars to settle cancer claims linked to their products, and many agricultural communities report elevated cancer rates and chronic disease.”
Fox News Digital reached out to the White House for comment.
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Living near heavy traffic could negatively impact your heart health.
A European study, published in the journal Environmental Research, found that exposure to nighttime road traffic noise is linked to changes in the blood, leading to worsened cholesterol and cardiovascular risks.
The researchers considered data from the U.K. Biobank, Rotterdam Study, and Northern Finland Birth Cohort 1966, including more than 272,000 adults over the age of 30, according to a press release.
Nighttime road noise exposure was estimated at all participants’ homes based on national noise maps. Researchers also took blood samples to measure the participants’ metabolic biomarkers for disease, then mapped the link between nightly noise levels and existence of biomarkers.
Exposure to loud noise was associated with increased concentrations of cholesterol-related biomarkers. (iStock)
The study found that people exposed to louder noise at night — especially sounds above 55 decibels — showed changes in 48 different substances in their blood. Twenty of these associations “remained robust” throughout all cohorts.
Exposure to loud noise was associated with increased concentrations of cholesterol-related biomarkers, especially LDL “bad” cholesterol, IDL (intermediate-density lipoprotein) and unsaturated fatty acids.
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As noise levels increased, starting at around 50 decibels, cholesterol markers rose steadily, the release stated.
The authors concluded that this study “provides evidence that nighttime road traffic noise exposure from 50 dB upward is associated with alterations in blood cholesterol and lipid profiles in adults.”
Researchers noted a link between traffic noise and cardiometabolic disease. (iStock)
Study co-author Yiyan He, doctoral researcher at the University of Oulu in Finland, noted that in this type of research, small effect sizes are expected, and environmental exposures such as traffic noise are “typically modest.”
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“Despite this, we observed statistically robust and consistent associations across many biomarkers, especially those related to LDL and IDL lipoproteins,” she told Fox News Digital.
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“We also identified a clear exposure-response pattern starting at around 50 dB, suggesting that metabolic changes become more evident as noise levels increase.”
This aligns with public health guidance, as the World Health Organization recommends lower nighttime noise limits at around 40 to 45 dB, Yiyan He added.
“This finding may clarify the association between traffic noise and cardiometabolic diseases,” the researchers wrote. (iStock)
“The 55 dB level is often used as an interim benchmark associated with substantial noise annoyance and sleep disturbance,” she said. “In our study, we observed associations not only at 55 dB, but also indications of effects emerging at around 50 dB.”
The strength and consistency of the cholesterol-related associations were surprising, as these changes are usually “subtle.”
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“Instead, we found consistent associations across multiple large European cohorts, which strengthens confidence that the findings may reflect real biological patterns,” Yiyan He went on. “We were also interested to see that effects were minimal below ~50 dB, suggesting a possible threshold-like pattern.”
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The researcher noted that these findings were consistent across genders, education levels and obesity status.
The study was restricted to White Europeans, which posed a limitation. There was also a lack of information on the fasting status in the UK Biobank.
Changes in cholesterol levels were more severe than researchers expected. (iStock)
“Fasting can influence levels of certain metabolites, particularly fatty acids,” Yiyan He said. “However, based on UK Biobank documentation, fewer than 10% of participants were fasting for at least eight hours, and our main findings focused on cholesterol-related biomarkers, which are generally less sensitive to short-term fasting.”
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The researchers also lacked information on bedroom location, indoor noise exposure and time spent at home.
“These factors may introduce non-differential exposure misclassification,” Yiyan He said. “Additionally, noise exposure estimates were based on participants’ temporary residential addresses at the time of blood sampling, without considering the duration of residence.”
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“Many of these limitations would tend to bias results toward the null, so the consistent associations we observed remain noteworthy.”
Experts recommend taking measures to limit traffic noise at night. (iStock)
Based on this latest research, Yiyan He noted that nighttime noise is a “health-relevant exposure,” not just “an annoyance.”
“Our findings suggest that nighttime traffic noise may subtly but consistently affect metabolic health,” she said. “While the changes in cholesterol and lipid levels for any one individual are small, traffic noise affects a very large number of people, which means the potential public health impact could be substantial.”
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The researcher recommends taking measures like improving sound insulation, using noise-reducing strategies and placing bedrooms on the quieter side of the home when possible.
“Because sleep is a key pathway linking noise to health, protecting the nighttime sleep environment is especially important,” she added.
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