How extreme heat can affect you—and how you can protect yourself
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Because of climate change, last summer was the hottest in the Northern Hemisphere in 2,000 years—and this summer is expected to be even hotter. The record may continue to be broken: Extreme heat is expected to become even more frequent.
The scorching heat has led to an increase in heat-related deaths in the United States, according to the Department of Health and Human Services, with approximately 2,300 deaths in the summer of 2023. Extreme heat, defined as a period of two to three days with high heat and humidity with temperatures above 90 degrees Fahrenheit, can have serious health consequences, including symptoms like headache, dizziness, loss of consciousness, nausea, and confusion.
As we face more extreme heat, you may be wondering how you can protect yourself and your loved ones. Read on to learn about heat-related illness, who’s most at risk, and more.
What happens when our bodies are exposed to extreme heat?
As our body temperature rises, our bodies attempt to cool down by opening up more blood vessels near the skin to begin sweating. The evaporation of our sweat regulates our body temperature, but it also leads to losing fluids and minerals.
When it’s too humid, sweating alone doesn’t do the trick. The heart must work harder to bring blood around the body. It starts beating faster, which can cause light-headedness, nausea, and headache.
This process can affect our health in different ways, including increasing our risk of hospitalization for heart disease, worsening asthma, and injuring kidneys due to dehydration. It can also result in heat-related illness. Below are some effects of heat on our bodies:
- Heat cramps: Occur when a person loses salt through sweating, which causes painful cramps. Symptoms begin as painful spasms after heavy sweating, usually in the legs or the stomach. Heat cramps can lead to heat exhaustion or heat stroke.
- Heat exhaustion: This occurs when the body loses an excessive amount of water and salt, usually during intense physical activity. Symptoms include irritability, heavy sweating, and weakness, including muscle cramps. Heat exhaustion can lead to heat stroke.
- Heat stroke: This is the most severe heat-related illness. It happens when the body can’t cool down and reaches a temperature of 106 Fahrenheit or higher within 10 to 15 minutes. If the person doesn’t receive emergency treatment, it can cause permanent disability or death. Symptoms include confusion, loss of consciousness, and seizures.
What should I do if someone experiences a heat-related illness?
If you or someone you’re with begins to show signs of heat illness, the Centers for Disease Control and Prevention recommends the following:
- Heat cramps: Stop all physical activity, drink water or a sports drink, move to a cool place, and wait for cramps to go away before resuming activity. If the cramps last more than an hour, you’re on a low-sodium diet, or you have heart problems, get medical help.
- Heat exhaustion: Move the person to a cool place, loosen their clothes, use a cool bath or cloths to try to lower their body temperature, and give them a sip of water. If the person throws up, or if their symptoms last longer than an hour or worsen, get medical help.
- Heat stroke: Call 911 immediately. Then, move the person to a cooler place, use cool cloths or a cool bath to help lower their temperature, and don’t give them anything to drink.
Read more about heat-related illness and what to do in each case.
Who’s more vulnerable to extreme heat?
While everyone can be affected by extreme heat, some people are more at risk, including people of color.
A 2023 KFF report outlined that because of historical residential segregation in the U.S. (known as “redlining”), people of color are more likely to live in areas that experience higher temperatures from rooftops, asphalt, and sidewalks that retain the sun’s heat (known as the “urban heat island effect”). Additionally, communities of color are more likely to live in areas with fewer trees, which act as a canopy and provide shade, making the heat worse and more direct.
Children under 5, adults 65 or over, and pregnant people are also more vulnerable to extreme heat. If you have a chronic health condition like diabetes, heart problems, or a mental health condition, you’re also at higher risk. (Some psychiatric medications, like antidepressants, can also make people more susceptible to heat).
Lastly, anyone exposed to the sun and extreme heat for long periods is also at higher risk. This includes athletes, people who work outdoors, and unhoused people.
What can I do to prevent heat-related illness during a heat wave?
During a heat wave, follow these tips to stay cool and protect yourself from heat-related illness:
- Never leave your pets or children inside a car.
- Wear loose, light-colored clothing (dark colors absorb more heat).
- Find shade if you’re outside.
- If you don’t have air conditioning in your home, go to a place where you can cool down, such as a local library, community center, local pool or splash pad, or mall. Check to see if your city has designated cooling centers. (Cities like New York have a list of places.)
- Wear a hat.
- Drink (non-alcoholic) fluids often to stay hydrated—and if you have pets, give them water frequently as well.
- Check on your family members or older neighbors who may be more sensitive to extreme heat.
- Avoid using your stove or oven too often or during the hottest parts of the day.
- Cover your windows with shades to keep the heat out.
What are some resources to prevent heat-related illness?
If you need financial assistance to cool down your home, such as to purchase an air conditioner, apply to the federal government’s Low Income Home Energy Assistance Program.
Before you head outside during a heat wave, use the CDC’s HeatRisk tool: Enter your zip code to find the current heat risk in your area and get tips on what to do to stay safe with each risk level.
During a heat wave, also look for a cooling center in your state using the National Center for Healthy Housing’s list.
Check out the National Weather Service’s for more tips and resources.
For more information, talk to your health care provider.
This article first appeared on Public Good News and is republished here under a Creative Commons license.
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The Distracted Mind – by Dr. Adam Gazzaley and Dr. Larry Rosen
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Yes, yes, we know, unplug once in a while. But what else do this highly-qualified pair of neuroscientists have to offer?
Rather than being a book for the sake of being a book, with lots of fluff and the usual advice about single-tasking, the authors start with a reframe:
Neurologically speaking, the hit of dopamine we get when looking for information is the exact same as the hit of dopamine that we, a couple of hundred thousand years ago, got when looking for nuts and berries.
- When we don’t find them, we become stressed, and search more.
- When we do find them, we are encouraged and search more nearby, and to the other side of nearby, and near around, to find more.
But in the case of information (be it useful information or celebrity gossip or anything in between), the Internet means that’s always available now.
So, we jitter around like squirrels, hopping from one to the next to the next.
A strength of this book is where it goes from there. Specifically, what evidence-based practices will actually keep our squirrel-brain focused… and which are wishful thinking for anyone who lives in this century.
Bringing original research from their own labs, as well as studies taken from elsewhere, the authors present a science-based toolkit of genuinely useful resources for actual focus.
Bottom line: if you think you could really optimize your life if you could just get on track and stay on track, this is the book for you.
Click here to check out The Distracted Mind, and get yours to focus!
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Apple vs Fig – Which is Healthier?
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Our Verdict
When comparing apples to figs, we picked the figs.
Why?
These two fruits are both known for being quite rich in sugar (but also rich in fiber, which offsets it metabolically), and indeed their macros are quite similar. That said, figs have slightly more fiber, carbs, and protein. Both are considered low glycemic index foods. We can consider this category a tie, or perhaps a nominal win for figs.
In the category of vitamins, apples have more of vitamins C and E, while figs have more of vitamins A, B1, B2, B3, B5, B6, B7, and B9, with noteworthy margins of difference. A clear for figs here!
Looking at minerals, apples are not higher in any minerals, while figs are several times higher in calcium, copper, iron, magnesium, manganese, phosphorus, potassium, selenium, and zinc. An overwhelming third-round win for figs.
Adding up the sections makes for a clear overall win for figs, but by all means do enjoy either or both, as diversity is best!
Want to learn more?
You might like:
From Apples To Bees, and High-Fructose Cs, Which Sugars Are Healthier, And Which Are Just The Same?
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No, beetroot isn’t vegetable Viagra. But here’s what else it can do
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Beetroot has been in the news for all the wrong reasons. Supply issues in recent months have seen a shortage of tinned beetroot on Australian supermarket shelves. At one point, a tin was reportedly selling on eBay for more than A$65.
But as supplies increase, we turn our attention to beetroot’s apparent health benefits.
Is beetroot really vegetable Viagra, as UK TV doctor Michael Mosley suggests? What about beetroot’s other apparent health benefits – from reducing your blood pressure to improving your daily workout? Here’s what the science says.
What’s so special about beetroot?
Beetroot – alongside foods such as berries, nuts and leafy greens – is a “superfood”. It contains above-average levels per gram of certain vitamins and minerals.
Beetroot is particularly rich in vitamin B and C, minerals, fibre and antioxidants.
Most cooking methods don’t significantly alter its antioxidant levels. Pressure cooking does, however, lower levels of carotenoid (a type of antioxidant) compared to raw beetroot.
Processing into capsules, powders, chips or juice may affect beetroot’s ability to act as an antioxidant. However, this can vary between products, including between different brands of beetroot juice.
Is beetroot really vegetable Viagra?
The Romans are said to have used beetroot and its juice as an aphrodisiac.
But there’s limited scientific evidence to say beetroot improves your sex life. This does not mean it doesn’t. Rather, the vast number of scientific studies looking at the effect of beetroot have not measured libido or other aspects of sexual health.
How could it work?
When we eat beetroot, chemical reactions involving bacteria and enzymes transform the nitrate in beetroot into nitrite, then to nitric oxide. Nitric oxide helps dilate (widen) blood vessels, potentially improving circulation.
The richest sources of dietary nitric oxide that have been tested in clinical studies are beetroot, rocket and spinach.
Nitric oxide is also thought to support testosterone in its role in controlling blood flow before and during sex in men.
Beetroot’s ability to improve blood flow can benefit the circulatory system of the heart and blood vessels. This may positively impact sexual function, theoretically in men and women.
Therefore, it is reasonable to suggest there could be a modest link between beetroot and preparedness for sex, but don’t expect it to transform your sex life.
What else could it do?
Beetroot has received increasing attention over recent years due to its antioxidant and anti-tumour effect in humans.
Clinical trials have not verified all beetroot’s active ingredients and their effects. However, beetroot may be a potentially helpful treatment for various health issues related to oxidative stress and inflammation, such as cancer and diabetes. The idea is that you can take beetroot supplements or eat extra beetroot alongside your regular medicines (rather than replace them).
There is evidence beetroot juice can help lower systolic blood pressure (the first number in your blood pressure reading) by 2.73-4.81 mmHg (millimetres of mercury, the standard unit of measuring blood pressure) in people with high blood pressure. Some researchers say this reduction is comparable to the effects seen with certain medications and dietary interventions.
Other research finds even people without high blood pressure (but at risk of it) could benefit.
Beetroot may also improve athletic performance. Some studies show small benefits for endurance athletes (who run, swim or cycle long distances). These studies looked at various forms of the food, such as beetroot juice as well as beetroot-based supplements.
How to get more beetroot in your diet
There is scientific evidence to support positive impacts of consuming beetroot in whole, juice and supplement forms. So even if you can’t get hold of tinned beetroot, there are plenty of other ways you can get more beetroot into your diet. You can try:
- raw beetroot – grate raw beetroot and add it to salads or coleslaw, or slice beetroot to use as a crunchy topping for sandwiches or wraps
- cooked beetroot – roast beetroot with olive oil, salt and pepper for a flavour packed side dish. Alternatively, steam beetroot and serve it as a standalone dish or mixed into other dishes
- beetroot juice – make fresh beetroot juice using a juicer. You can combine it with other fruits and vegetables for added flavour. You can also blend raw or cooked beetroot with water and strain to make a juice
- smoothies – add beetroot to your favourite smoothie. It pairs well with fruits such as berries, apples and oranges
- soups – use beetroot in soups for both flavour and colour. Borscht is a classic beetroot soup, but you can also experiment with other recipes
- pickled beetroot – make pickled beetroot at home, or buy it from the supermarket. This can be a tasty addition to salads or sandwiches
- beetroot hummus – blend cooked beetroot into your homemade hummus for a vibrant and nutritious dip. You can also buy beetroot hummus from the supermarket
- grilled beetroot – slice beetroot and grill it for a smoky flavour
- beetroot chips – slice raw beetroot thinly, toss the slices with olive oil and your favourite seasonings, then bake or dehydrate them to make crispy beetroot chips
- cakes and baked goods – add grated beetroot to muffins, cakes, or brownies for a moist and colourful twist.
You can add beetroot to baked goods. Ekaterina Khoroshilova/Shutterstock Are there any downsides?
Compared to the large number of studies on the beneficial effects of beetroot, there is very little evidence of negative side effects.
If you eat large amounts of beetroot, your urine may turn red or purple (called beeturia). But this is generally harmless.
There have been reports in some countries of beetroot-based dietary supplements contaminated with harmful substances, yet we have not seen this reported in Australia.
What’s the take-home message?
Beetroot may give some modest boost to sex for men and women, likely by helping your circulation. But it’s unlikely to transform your sex life or act as vegetable Viagra. We know there are many contributing factors to sexual wellbeing. Diet is only one.
For individually tailored support talk to your GP or an accredited practising dietitian.
Lauren Ball, Professor of Community Health and Wellbeing, The University of Queensland and Emily Burch, Lecturer, Southern Cross University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Recent outbreaks highlight the risks of bacterial meningitis and the need to vaccinate
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Outbreaks of bacterial meningococcal disease in England and recent cases in students in New Zealand have raised awareness of this serious and life-threatening disease.
The disease is caused by the bacterium Neisseria meningitidis and presents as meningitis or blood poisoning (septicaemia).
Meningitis is an inflammation of the membranes that cover the brain and spinal cord (meninges), while septicaemia affects the whole body through the presence of bacteria in the blood stream.
Both can be also be caused by other infectious agents, but bacterial meningococcal disease is the most severe form.
Infants, children and young adults are at higher risk. While the disease is largely preventable through vaccination, only one vaccine is currently on the national immunisation schedule in Aotearoa New Zealand.
As part of ongoing research to explain the recent cases, we compared the meningococcal strains involved in both countries and explored the significance of people who carry the bacterium but don’t develop symptoms or disease.
There are several strains of Neisseria meningitidis and most belong to six groups (named A, B, C, W, X and Y). All have an extraordinary ability to swap genetic material between them and switch genes on and off through a process known as phase variation.
This can change the surface of the bacterium, enabling it to escape the body’s immune system.
The strains responsible for both the UK and recent Dunedin cases belong to Group B meningococci. However, the similarity ends there. The UK outbreak strain is known as ST485, while the Dunedin cases were caused by different strains. They differ from the UK strain as well as from each other, suggesting more than one chain of transmission was involved.
The Bexsero vaccine is used to protect people against bacterial meningitis caused by group B strains. It was designed to recognise components in the outer membrane and on the surface of the bacteria.
The strain that caused the UK outbreak is likely covered by the Bexero vaccine because it matches exactly one of the protein antigen sequences used in the vaccine.
But genomic sequencing of the bacteria responsible for one of the Dunedin cases is still pending, while the other case did not yield a bacterial culture.
Students and staff queue to receive antibiotics at the UK University of Kent after an outbreak of meningitis caused the deaths of two people. Carl Court/Getty Images The importance of genome sequencing
Although meningococcal disease can appear as scattered and apparently unrelated cases, these can occasionally build into larger outbreaks.
Strain typing and genome sequencing can help to determine if an apparent outbreak is due to the emergence of a particular strain or a cluster of cases that are genetically unrelated.
Both scenarios can occur if cases share a common risk factor, such as increased close contact and mixing in educational settings such as schools and universities.
Past genomic surveillance in New Zealand has shown the emergence of outbreak strains and helped identify likely resistance to antibiotics. For example, a W group strain variant caused rising numbers of meningococcal disease between 2016 and 2019 in New Zealand and an outbreak in Northland in 2018.
Genome sequencing showed this strain was different from the W strain causing disease in Europe at the time, and the specific 2015 variant also has increased resistance to penicillin.
Healthy people can be carriers
Despite its ability to cause severe disease, the bacterium causing meningococcal disease is often found in people’s throat, without causing symptoms.
About 5% to 30% of the global population are carriers, and most don’t experience any symptoms or disease. We don’t yet fully understand the factors that determine whether disease develops.
Genome sequencing has shown that some highly virulent strains which are associated with outbreaks are rarely identified in samples from healthy carriers. But as yet, attempts to find genomic explanations for differences in bacteria found in outbreaks and healthy carriers remain inconclusive.
The likelihood whether people carry the bacterium is age dependent. It is low in younger children and older people, but high in teenagers and young adults.
The high carriage rate in young adults makes university students a high-risk group for developing the disease. Crowded living conditions also contribute to the high carriage rate, exacerbating the risk.
In New Zealand, both the Bexsero (against group B) and MenQuadfi (against ACWY) vaccines are available to young people moving into boarding school or university halls the first time. In contrast, only one vaccine (against ACWY) is currently funded for university students in England.
Both vaccines are needed to have maximum protection. Conjugate ACWY vaccines may reduce carriage and therefore transmission. Bexsero does not reduce carriage but protects against development of the disease.
Impact of COVID measures on transmission
Lockdowns and border controls introduced during the COVID pandemic reduced transmission of the SARS-CoV2 virus. But they also had a major effect on other diseases, including influenza and other respiratory viruses.
Cases of meningococcal disease were also dramatically reduced during the COVID response, most likely due to reduced contact between individuals and because fewer infected people entered the country.
This graph shows the drop in cases of meningococcal disease, across all age groups, during the period of COVID lockdowns. Data extracted from the PHF Science notifiable disease dashboard for meningococcal disease, CC BY-SA The rebound in cases following relaxation of these strict measures was expected.
This highlights how important it is to be aware of the risks associated with large gatherings, particularly of young people, and the need to vaccinate with the Bexsero vaccine as part of the immunisation schedule as well as MenQuadfi for high-risk groups.
Una Ren, Senior Scientist in Genomics, New Zealand Institute for Public Health and Forensic Science; Nigel French, Distinguished Professor of Infectious Disease Epidemiology and Public Health, Te Kunenga ki Pūrehuroa – Massey University, and Sarah Hannah, Doctoral Candidate in Epidemiology, Te Kunenga ki Pūrehuroa – Massey University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Peanuts vs Pecans – Which is Healthier?
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Our Verdict
When comparing peanuts to pecans, we picked the peanuts.
Why?
Peanuts are an oft-underrated nut!
In terms of macros, peanuts have more than 2.5x the protein and slightly more carbs, while pecans have very slightly more fiber and a lot more fat, of which, mostly healthy monounsaturated and polyunsaturated fats, though it’s worth noting that peanuts’ fats are equally healthy and have a similar general profile, just, less fat per 100g than pecans do. There’s a lot going for both of these very different nuts here, so we’ll call this category a tie.
In the category of vitamins, peanuts have more of vitamins B2, B3, B5, B6, B7, B9, E, and choline, while pecans have more of vitamins C and K (of which they are still not a very good source, but peanuts have none so they can technically claim it for those two vitamins); thus, a clear win for peanuts here, especially as most of its vitamins had very large margins of difference over pecans, and peanuts are a good source of all the vitamins mentioned for them.
When it comes to minerals, peanuts have more calcium, iron, magnesium, phosphorus, potassium, and selenium, while pecans have more manganese and zinc. Another win for peanuts!
Adding up the sections makes for a clear win for peanuts, but by all means enjoy either or both (diversity is good), unless you are allergic, in which case, please don’t!
Want to learn more?
You might like:
Why You Should Diversify Your Nuts
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Doctors From 15 Specialties Tell The Worst Common Mistakes People Make
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Whatever your professional background, you probably know many things about it that are very obvious to you, but that most people don’t know. So it is for doctors too; here are the things that doctors from 15 specialties would never do, and thus advise people against doing:
Better safe than sorry
We’ll leap straight into it:
- General Surgery: avoid rushing into musculoskeletal or spinal surgery unless absolutely necessary; conservative treatments like physical therapy are often effective.
- Interventional Gastroenterology: avoid long-term, around-the-clock use of anti-inflammatory pain medications (e.g. Ibuprofen and friends) to prevent stomach ulcers.
- Podiatry: never place feet on the car dashboard due to the risk of severe injuries from airbag deployment.
- Rheumatology: avoid daily use of high heels to prevent joint and foot deformities, bunions, and pain.
- Otorhinolaryngology: never smoke, as it can lead to severe consequences like laryngectomy and other life-altering conditions.
- Pediatrics: avoid dangerous activities for children, such as swimming alone, eating choking hazards, biking or skiing without a helmet, or consuming raw meat/fish/dairy. Also, be cautious with firearms in homes.
- Orthopedic Surgery: avoid riding motorcycles and handling fireworks due to high risks of accidents.
- Emergency Medicine: never drink and drive or ride ATVs. Always use eye protection during activities like woodworking.
- Ophthalmology: always wear safety glasses during activities like grinding metal or woodworking. Sunglasses are essential to prevent UV damage even on cloudy days.
- Urology: avoid shaving pubic hair if diabetic or immunocompromised to prevent severe infections like Fournier’s gangrene.
- Gastroenterology: do not use gut health supplements as they lack proven efficacy and are often a waste of money*
- Plastic Surgery: avoid contour threads (barbed sutures for facial rejuvenation) and butt implants due to risks like infection, complications, and poor outcomes.
- Psychiatry: never take recreational drugs from unknown sources to avoid accidental overdoses, especially from substances laced with fentanyl. Carry Narcan for emergencies.
- Dermatology: use sunscreen daily to prevent skin cancer, aging, pigmentation issues, and texture problems caused by UV exposure.
- Cardiology: avoid the carnivore diet as it increases heart disease risks due to its negligible fiber content and high saturated fat intake.
*We had an article about this a while back; part of the problem is that taking probiotics without prebiotics can mean your new bacteria just die in about 20 minutes, which is their approximate lifespan in which to multiply or else die out. Similar problems arise if taking them with sugar that feeds their competitors instead. See: Stop Sabotaging Your Gut!
For more on each of these, in the words of the respective doctors, enjoy:
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