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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Collagen supplements have exploded in popularity, touted as everything from an anti-aging miracle to a muscle recovery booster.
But a sweeping new review conducted by U.K. researchers suggests that while collagen may help improve skin elasticity and ease arthritis pain, it does little for athletic performance or wrinkle reduction.
Researchers from Anglia Ruskin University analyzed 16 systematic reviews and 113 randomized controlled trials involving nearly 8,000 participants worldwide, which they say is the most extensive evaluation of collagen’s health effects to date.
The review found consistent evidence that collagen supplementation improves skin elasticity and hydration over time and provides significant relief from osteoarthritis-related joint pain and stiffness, according to findings published in Aesthetic Surgery Journal Open Forum.
A large U.K. review found that collagen supplements may improve skin elasticity and hydration over time. (iStock)
The researchers, however, did not find meaningful improvements in post-exercise muscle recovery, soreness or tendon mechanical properties (strength, springiness and stretch resistance).
“Collagen is not a cure-all, but it does have credible benefits when used consistently over time, particularly for skin and osteoarthritis,” co-author Lee Smith, professor of public health at Anglia Ruskin University, said in a statement.
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“Our findings show clear benefits in key areas of healthy aging, while also dispelling some of the myths surrounding its use,” Smith added.
Collagen, the most abundant protein in the body, supports skin, bones, tendons, cartilage and connective tissue, according to experts. Natural collagen production begins to drop in early adulthood and declines more sharply with age.
The study found that collagen supplements may help reduce joint pain and stiffness in people with osteoarthritis. (iStock)
The review found that long-term collagen supplementation was linked to improved skin firmness and hydration, but did not help skin roughness — a proxy for visible wrinkles.
Benefits appear to accumulate gradually, suggesting that collagen should not be viewed as an “anti-wrinkle ‘quick fix,’ but as a foundational dermal support for individuals seeking holistic skin maintenance,” the researchers said.
“If we define anti-aging as a product or technique designed to prevent the appearance of getting older, then I believe our findings do support this claim for some parameters,” Smith told the BBC. “For example, an improvement in skin tone and moisture is associated with a more youthful-looking appearance.”
Collagen supplementation was linked to reduced pain and stiffness in people with osteoarthritis, with stronger benefits seen over longer periods of use, and showed modest improvements in muscle mass and tendon structure that may support healthy aging.
Collagen did not significantly improve skin roughness, a marker of visible wrinkles. (iStock)
However, it did not show meaningful results when used as a fast-acting sports performance supplement, and evidence for benefits related to cholesterol, blood sugar, blood pressure and oral health was mixed or inconclusive.
Dr. Daniel Ghiyam, a California-based physician and longevity specialist, said the findings align with what he sees in clinical practice.
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“Collagen is a targeted support tool, not a foundation of health or performance,” Ghiyam, who was not involved in the study, told Fox News Digital. “When marketed that way, it makes sense. When marketed as a cure-all, it doesn’t hold up to the data.”
The authors noted that while many previous collagen studies have received financial support from the supplement industry, the current review did not receive industry funding.
Experts say collagen supplements may offer modest benefits for skin hydration and joint comfort, but they are not a cure-all. (iStock)
The team called for more high-quality clinical trials examining long-term outcomes, optimal dosages and differences between collagen sources, such as marine, bovine and plant-based alternatives.
Among its limitations, the review could not determine whether certain forms of collagen work better than others or what the optimal regimen should be.
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While the review included randomized controlled trials, the quality of the studies varied, with newer research generally showing stronger results.
Experts say more data and studies are needed to build on the findings. They also noted that diet plays a crucial role in skin health.
Collagen supplements, often sold as powders or pills, may improve skin elasticity and ease joint pain, experts say. (iStock)
Dr. Erum Ilyas, a Pennsylvania-based dermatologist and chair of dermatology at Drexel University College of Medicine, noted that the review analyzed previously published meta-analyses rather than generating new primary data.
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“At this time, I have not seen sufficiently strong independent evidence to routinely recommend collagen supplements to my patients,” Ilyas, who was not involved in the review, told Fox News Digital.
“Although some studies show modest improvements in markers such as hydration and elasticity, there remains limited independent, biopsy-confirmed evidence demonstrating sustained increases in dermal collagen content,” she added.
Fox News Digital has reached out to the researchers for comment.
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As colorectal cancer (CRC) is now the leading cause of cancer death in adults under 50, a new report reveals some surprising shifts in the incidence of the disease.
Although rates of CRC have been declining among seniors, those 65 and under are facing a rise in diagnoses, according to a report titled Colorectal Cancer Statistics, 2026, from the American Cancer Society.
Adults 65 and younger comprise nearly half (45%) of all new colorectal cancer cases — a significant increase from 27% in 1995, states the report, which was published in CA: A Cancer Journal for Clinicians.
The disease is rising fastest among adults 20 to 49 years old, at a rate of 3% per year.
Colorectal cancer is now the leading cause of cancer death in adults under 50. (iStock)
Among adults 50 and under, 75% of colorectal cancers are diagnosed at an advanced stage. Half of the diagnoses in that age range are made between the ages of 45 and 49. Although that age group is eligible to receive routine screenings, just 37% do so.
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The report also revealed that rectal cancer is on the rise, now accounting for about one-third (32%) of all CRC cases — an increase from 27% in the mid-2000s.
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“After decades of progress, the risk of dying from colorectal cancer is climbing in younger generations of men and women, confirming a real uptick in disease because of something we’re doing or some other exposure,” said Rebecca Siegel, senior scientific director, surveillance research at the American Cancer Society and lead author of the report, in a press release.
Among adults 50 and under, 75% of colorectal cancers are diagnosed at an advanced stage. Half of the diagnoses in that age range are made between the ages of 45 and 49. (iStock)
“We need to redouble research efforts to understand the cause, but also circumvent deaths through earlier detection by educating clinicians and the general public about symptoms and increasing screening in people 45-54 years.”
It is projected that 158,850 new cases of colorectal cancer will be diagnosed this year, and that the disease will cause 55,230 deaths, per the report.
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More than half of CRC cases can be linked to high-risk behaviors, the researchers said. Those include lack of nutrition, high alcohol consumption, smoking, lack of exercise and obesity.
“These findings further underscore that colorectal cancer is worsening among younger generations and highlight the immediate need for eligible adults to begin screening at the recommended age of 45,” said Dr. William Dahut, chief scientific officer at the American Cancer Society.
When the disease is caught at a local (early) stage, the five-year survival rate is 95%. (iStock)
“The report also shines a light on the crucial importance of continued funding for research to help discover new therapies to treat the disease and advance patient care.”
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When the disease is caught at a local (early) stage, the five-year survival rate is 95%, the report stated.
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A new study suggests that middle-aged men may be more vulnerable to faster biological aging, potentially linked to exposure to “forever chemicals.”
The research, published in the journal Frontiers in Aging, examined how perfluoroalkyl and polyfluoroalkyl substances, more commonly known as PFAS, could impact aging at the cellular level.
PFAS are synthetic chemicals commonly used in nonstick cookware, food packaging, water-resistant fabrics and other consumer products, the study noted.
Their chemical structure makes them highly resistant to breaking down, allowing them to accumulate in water, soil and the human body.
Chinese researchers analyzed blood samples from 326 adults enrolled in the U.S. National Health and Nutrition Examination Survey between 1999 and 2000.
A new study suggests that middle-aged men could face accelerated biological aging at the cellular level due to exposure to PFAS. (iStock)
The researchers measured levels of 11 PFAS compounds in participants’ blood and used DNA-based “epigenetic clocks” — tools that analyze chemical changes to DNA to estimate biological age — to determine how quickly their bodies were aging at the cellular level, the study stated.
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Two compounds, perfluorononanoic acid (PFNA) and perfluorooctanesulfonamide (PFOSA), were detected in 95% of participants.
Higher concentrations of those chemicals were associated with faster biological aging in men of certain age groups, but not in women.
“People should not panic.”
The compounds most strongly linked to accelerated aging were not the PFAS chemicals that typically receive the most public attention, the researchers noted.
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“The associations were strongest in adults aged 50 to 64, particularly in men,” Dr. Xiangwei Li, professor at Shanghai Jiao Tong University School of Medicine and the study’s corresponding author, told Fox News Digital.
“While this does not establish that PFAS cause aging, it suggests that these widely present ‘forever chemicals’ may be linked to molecular changes related to long-term health and aging.”
The study found that two of the compounds were detected in 95% of participants, and higher levels were linked to faster biological aging in men ages 50–64. (iStock)
Midlife may represent a more sensitive biological period, when the body becomes more vulnerable to age-related stressors, according to the researchers.
Lifestyle factors, such as smoking, may influence biological aging markers, potentially increasing vulnerability to environmental pollutants.
While Li said “people should not panic,” she does recommend looking for reasonable ways to reduce exposure.
That might mean checking local drinking water reports, using certified water filters designed to reduce PFAS, and limiting the use of stain- or grease-resistant products when alternatives are available.
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Meaningful reductions in PFAS exposure will likely depend on broader regulatory action and environmental cleanup efforts, Li added.
The researchers noted that midlife could be a particularly sensitive stage, when the body is more susceptible to stressors associated with aging. (iStock)
Study limitations
The researchers outlined several important limitations of the research, including that the findings show an association, but do not prove that PFAS directly causes accelerated aging.
“The study is cross-sectional, meaning exposure and aging markers were measured at the same time, so we cannot determine causality,” Li told Fox News Digital.
The study was also relatively small, limited to 326 adults age 50 or older, which means the findings may not apply to younger people or broader populations.
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Researchers measured PFAS levels using data collected between 1999 and 2000, and today’s exposure patterns may differ.
Li added that while PFAS is known to persist in the environment and the body, these results should be validated through larger, more recent studies that follow participants over time.
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