Claim: Global Warming Induced Colder Winters Could Cause More Heart Attacks

Essay by Eric Worrall

First published JoNova; If we don’t act quickly to prevent more global warming, we could all freeze to death.


DEC. 12, 2022 / 12:17 PM

Climate change could worsen heart deaths linked to extreme temperatures

By Cara Murez, HealthDay News

Both extremely hot and very cold days take their toll on people who have heart disease, particularly those with heart failure.

A new multinational analysis of 32 million heart-related deaths over the past 40 years found more occurred on days with severe temperatures, an issue that climate change could make even worse.

The investigators compared heart-related deaths on the hottest and the coldest 2.5% of days in 567 cities with those on days when temperatures were optimal.

For every 1,000 heart-related deaths, there were an additional 2.2 deaths on days with extreme heat. There were also 9.1 additional deaths on days with extreme cold, the findings showed.

Among people with heart failure, there were 2.6 additional deaths on extremely hot days and 12.8 on extremely cold days, the researchers reported.

Read more:

The abstract of the study;

Associations Between Extreme Temperatures and Cardiovascular Cause-Specific Mortality: Results From 27 Countries

Barrak AlahmadHaitham KhraishahDominic RoyéAna Maria Vicedo-CabreraYuming GuoStefania I. PapatheodorouSouzana AchilleosFiorella AcquaottaBen ArmstrongMichelle L. BellShih-Chun PanMicheline de Sousa Zanotti Stagliorio CoelhoValentina ColistroTran Ngoc DangDo-Van DungFrancesca K. De’ DonatoAlireza EntezariYue-Liang Leon GuoMasahiro HashizumeYasushi HondaEne IndermitteCarmen ÍñiguezJouni J.K. JaakkolaHo KimEric LavigneWhanhee LeeShanshan LiJoana MadureiraFatemeh MayvanehHans OrruAla Vladimir OvercencoMartina S. RagettliNiilo R.I. RytiPaulo Hilario Nascimento SaldivaNoah ScovronickXerxes SeposoFrancesco SeraSusana Pereira SilvaMassimo StafoggiaAurelio TobiasEric GarshickAaron S. BernsteinAntonella ZanobettiJoel D. SchwartzAntonio Gasparrini and Petros Koutrakis

Originally published12 Dec 2022 2022;0


Background: Cardiovascular disease is the leading cause of death worldwide. Existing studies on the association between temperatures and cardiovascular deaths have been limited in geographic zones and have generally considered associations with total cardiovascular deaths rather than cause-specific cardiovascular deaths.

Methods: We used unified data collection protocols within the Multi-Country Multi-City Collaborative Network to assemble a database of daily counts of specific cardiovascular causes of death from 567 cities in 27 countries across 5 continents in overlapping periods ranging from 1979 to 2019. City-specific daily ambient temperatures were obtained from weather stations and climate reanalysis models. To investigate cardiovascular mortality associations with extreme hot and cold temperatures, we fit case-crossover models in each city and then used a mixed-effects meta-analytic framework to pool individual city estimates. Extreme temperature percentiles were compared with the minimum mortality temperature in each location. Excess deaths were calculated for a range of extreme temperature days.

Results: The analyses included deaths from any cardiovascular cause (32 154 935), ischemic heart disease (11 745 880), stroke (9 351 312), heart failure (3 673 723), and arrhythmia (670 859). At extreme temperature percentiles, heat (99th percentile) and cold (1st percentile) were associated with higher risk of dying from any cardiovascular cause, ischemic heart disease, stroke, and heart failure as compared to the minimum mortality temperature, which is the temperature associated with least mortality. Across a range of extreme temperatures, hot days (above 97.5th percentile) and cold days (below 2.5th percentile) accounted for 2.2 (95% empirical CI [eCI], 2.1–2.3) and 9.1 (95% eCI, 8.9–9.2) excess deaths for every 1000 cardiovascular deaths, respectively. Heart failure was associated with the highest excess deaths proportion from extreme hot and cold days with 2.6 (95% eCI, 2.4–2.8) and 12.8 (95% eCI, 12.2–13.1) for every 1000 heart failure deaths, respectively.

Conclusions: Across a large, multinational sample, exposure to extreme hot and cold temperatures was associated with a greater risk of mortality from multiple common cardiovascular conditions. The intersections between extreme temperatures and cardiovascular health need to be thoroughly characterized in the present day—and especially under a changing climate.

Read more:

Are the doctors seriously suggesting global warming is responsible for cold weather mortality? Also from the paper;

Climate change produces both hotter summers and colder winters, rendering populations not accustomed to these unusual weather conditions vulnerable, especially in low-income areas where there may be less adaptability to changing conditions.

Read more: (full study PDF)

Strangely the message from climate scientists used to be that global warming would cause milder winters – hence all those hilarious “end of snow” predictions. Milder winters would have reduced winter mortality, and likely have reduced overall seasonal mortality, given that too cold seems to be worse for our health than too hot.

But that was yesterminute’s settled science.

Now the settled climate consensus appears to be that global warming causes all the bad weather, hot or cold. So when you feel the bitterness of a freezing cold winter, what you are really experiencing is life threatening global warming.

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December 13, 2022 6:09 am

It should be fun to read comments on this thread when it fills.

I’ll be back,

Reply to  Bob Tisdale
December 13, 2022 11:59 am

It’s been longstanding irony that the warmunists claim that global warming causes global cooling, and they actually say it with a straight face, sort of.

It’s just too easy, like shooting fish in a barrel.

Rich Davis
Reply to  Duane
December 13, 2022 2:07 pm

What else can they do but make baseless assertions and appeals to authority? The weather is an affront to their religious sensibilities.

Reply to  Duane
December 13, 2022 5:18 pm

Or, as they say in America, “Batting a thousand”.

December 13, 2022 6:15 am

Since leftists want more people to die in order to reduce the global population they should be encouraging climate change. They are so conflicted and confused, perhaps we should use the Canadian model on them and apply a bit of euthanasia to ease their suffering.

Reply to  2hotel9
December 13, 2022 8:16 am

The leftists don’t want people to die… in peace and comfort. They want people to die cold, hungry, and in fear for the crime of being born and using Gaia’s resources.

AGW is Not Science
Reply to  Brad-DXT
December 13, 2022 8:49 am

Except for themselves, of course.

Reply to  Brad-DXT
December 14, 2022 4:21 pm

Apres vous, Alfonse.

Last edited 1 month ago by RatMan29
Reply to  2hotel9
December 13, 2022 8:56 am

Net-Zero… abort.

December 13, 2022 6:16 am

Global warming turned me into a newt!

Fortunately, I got better.

Peta of Newark
December 13, 2022 6:21 am

Wrong. Again. Fauci will be behind this and even if he isn’t, the buck stops with him.

Vitamin C deficiency causes heart attacks.
aided by excess Sugar & Calcium in cahoots with deficiencies of Magnesium and the Vitamins D3 and K2
(and you need the full gamut of B Vitamins to get the C to work properly)

Bruce Cobb
Reply to  Peta of Newark
December 13, 2022 7:53 am

And in the northern hemisphere during winter months, unless one takes supplemental doses of it, one is apt to be deficient in D3 & K2. Thus the increased incidence of heart attacks. And yes, over-exertion, as in shoveling snow can be the triggering mechanism.

Ireneusz Palmowski
Reply to  Bruce Cobb
December 13, 2022 8:56 am

Yes, it is a necessity. Vitamin D3+K2 should be taken with a small amount of fat.

Reply to  Ireneusz Palmowski
December 13, 2022 10:52 pm

Or, as in my case, a large amount of fat.
Say, butter, olive oil, and avocado and pork crackling on toast.

Reply to  Bruce Cobb
December 13, 2022 12:50 pm

What is K2?

Reply to  Retired_Engineer_Jim
December 13, 2022 9:26 pm

Outside of the mountain K2?
They believe Vitamin K2 helps prevent calcification of arteries and veins.
USDA has plenty of articles on the topic.

Cholesterol is blamed and vilified for causing choke points where blood clots get stuck.
They’ve always known that the cholesterol coats calcium’s surface. Calcium causes the choke point.

3. Vitamin K Supplementation for Prevention of Vascular Calcification in Chronic Kidney Disease Patients: Are We There Yet?

Reply to  Retired_Engineer_Jim
December 14, 2022 2:34 am

This video explains why we need Vitamins D and K2.

Bill Powers
December 13, 2022 6:27 am

I have an annoyingly painful corn on the bottom of my left foot. Do you suppose it could have been caused by Global Warm…Ahh climate change? Or do you think there is significance to the fact the corns are only on my LEFT foot?

Reply to  Bill Powers
December 13, 2022 7:30 am

Well, you’ve just explained my recent back pain. Now I don’t feel obliged to do anything about it as another swing in the opposite direction will adjust the misaligned vertebrae.

Reply to  Bill Powers
December 13, 2022 8:40 am

Definitely CO2 helps corn to grow.

Reply to  Scissor
December 13, 2022 1:25 pm

Cute. Better wording : helps corn growth.

Reply to  Bill Powers
December 14, 2022 2:36 am

No doubt studies will show that your problem is more common in areas which experience extreme temperatures and extreme temperatures are caused by………….

David Dibbell
December 13, 2022 6:37 am

It must be the warming global AVERAGE temperature that operates to produce the extremes! That seems to be the claim out there.

But wait. If you think both hot and cold extremes will intensify, how have you come to expect the average to keep increasing?

An average is a numerical result. It has no operative authority over the weather or the resulting trends.

Ferdinand Engelbeen
December 13, 2022 6:38 am

About all studies about excess deaths show that cold related mortality is about 10 times heat related mortality.
Thus if the average temperature increases, the possibility of a heat wave increases and a cold wave decreases, thus with a lot less premature deaths as result.
Here one of these investigations:
Which also shows that people adapt to the local average temperatures…

AGW is Not Science
Reply to  Ferdinand Engelbeen
December 13, 2022 8:55 am

Only it doesn’t. What we have seen as the primary driver of the increase in the AVERAGE temperature is HIGHER NIGHT-TIME LOW temperatures, NOT higher daytime HIGH temperatures.

This means a MILDER climate with LESS “extremes,” NOT more.

The notion of a climate warming by for the most part an increase in overnight low temperatures causing “more extreme” WEATHER of any variety is mind-numbingly stupid.

Rick Wedel
Reply to  AGW is Not Science
December 14, 2022 7:02 pm

That’s a darn good point. Any suggested reads for a more complete discussion on this? Thanks.

Rick C
Reply to  Ferdinand Engelbeen
December 13, 2022 9:00 am

From the study description in the abstract, I’m guessing that they never looked at actual cause of death data. Just took the number of deaths on the hot/cold days compared to the rest. So excess deaths caused by say traffic accidents, gang shootings, kitchen fires, etc. that occurred on hot/cold days would be counted as climate related. If that’s the case, the study is useless.

Rich Davis
Reply to  Rick C
December 13, 2022 2:14 pm

You don’t need that caveat. The study is useless, full stop.

Reply to  Ferdinand Engelbeen
December 13, 2022 10:31 am

At best this study is incomplete. How many of the people who died during extreme weather events were already fatally ill. The number of excess deaths is so small that it could be a small additional stress induced a fatal response that would have happened anyway in the next few days. Or maybe a month or year. Many people who have fatal heart conditions die two, three, or more days after a stress causing event. I would have more confidence in such a study if it also limited the ages included to only people under 60 or maybe 70 but didn’t include people over 90. The real question is how many man-days were lost due to extreme weather. Was it days, months, or years. Unfortunately the numbers are so low that, even studying millions of lives lost, it would be almost impossible to pull that information out. As is usual, this study brings out more questions than answers.

Reply to  BCofTexas
December 13, 2022 11:24 am

I’ve heard the old wives tales about more people dying around Christmas for all of my life, LONG, LONG before we ever heard anything about ‘global warming’ or ‘Climate Change’! Shoveling snow MIGHT be a factor, except that people have always died, even in snow-less areas! Another OWT is the one about people dying during the full moon! Face it, people die all the time; they don’t really need a reason.

Mark Whitney
December 13, 2022 7:03 am

Here in SLC I have about 6 inches of global warming to get through this morning and will get into the toasty temperature teens later in the week. Can I sue Mikey Mann for false advertising?

Reply to  Mark Whitney
December 13, 2022 9:33 am

Hope your partner enjoys your ‘6 inches of global warming’ !!!

Reply to  1saveenergy
December 13, 2022 10:09 am

I think you’re getting confused between global warming and local warming

All hail the morning glory

DD More
Reply to  Mark Whitney
December 13, 2022 1:01 pm

And this brings up another cause of heart attacks that differs between cold and hot weather.
Never had to shovel any of that sunshine, but had lots of the white cold stuff to move. Always lots of reports of others having heart attach’s while doing this.

December 13, 2022 7:07 am

Is there any truth to the belief that cold weather induces cardiac events because of overexertion from shoveling snow? ‘Cause that’s what I tell my wife when she complains about the half-assed way I cleared the driveway.

Ron Long
December 13, 2022 7:07 am

Hot and Cold? Remember the children’s fable: an old woman is walking through the snow and finds a snake, cold and unable to move. She picks up the snake and blows her breath on it to warm it up, and it revives. She takes the snake to her cottage to give him some food, and pours them both a bowl of hot soup. She then blows on the hot soup to cool it down, whereupon the snake bites her and injects lethal poison. As she lay dying, she asks the snake “why did you do that?” and the snake replies “you must be a witch because only a witch could blow hot or cold whenever they want”. Looks like we now have a more modernized version of witchcraft.

December 13, 2022 7:12 am

These AGW idiots produce doomsday scenarios that never, ever happen – this leads to increasing scepticism about the settled science, so the mob have now decided to make the weather fit the narrative, by making the narrative fit the weather – so dumb, now they look even more dodgy than before

December 13, 2022 7:17 am

And The Holdren-Doublethink Award for Most Unbelievable Claim (2022) goes to….

Alahmad et al


“Global Warming Induced Colder Winters”

we fit case-crossover models in each city 

To come up with some really bonkers claims. We didn’t need this waste of time and money to know cold kills far more people

AGW is Not Science
Reply to  strativarius
December 13, 2022 11:42 am



2. NOT a “catastrophe.”

Bruce Cobb
December 13, 2022 7:26 am

The science is clear, and is settled: Our CO2 (henceforth RCO2) is directly responsible for the Frankenweather™ we are now having, and which will become even worse as we continue to add RCO2. How long before Frankenweather reaches the GRB221009A (Gerb22) stage is anyone’s guess, but will depend on how soon we decide to live in mud huts in the cold and dark, eating leaves and twigs in order to keep that from happening. You’ve been warned.

Tom Abbott
Reply to  Bruce Cobb
December 14, 2022 3:52 am


Good one! It made me laugh.

Pat from Kerbob
December 13, 2022 7:29 am

Since “the Science” now admits that cold offs more people, especially older people, why not start a class action suit against governments in Europe that have implemented policies that have directly led to higher energy costs and energy shortages directly leading to their putting out directives about reducing home heating, only heating one room, etc, that will inevitably take out the few old folk who made it thru Covid?.

Why is it only the environmental whackos that get to use lawfare??

December 13, 2022 7:33 am

Actually it is known that hot weather precipitates cardiovascular problems rather than cold weather, however mortality is greater in cold weather.
Gasparrini et al (2015)”Mortality risk attributable to high and low ambient temperature: a multicountry observational study“, The Lancet, 386, 9991, pp 369-375

December 13, 2022 7:34 am

More climate nonsense will lead to humor that will only get sharper.

December 13, 2022 7:57 am

The people who write these nonsense papers must often stop and say to themselves –

“I never wanted to do this in the first place.
I always wanted to be –


Bill Toland
December 13, 2022 7:57 am

Climate alarmists don’t even care any longer how idiotic their claims are. In their deranged belief system, every effect of global warming is bad, irrespective of the evidence.

December 13, 2022 8:01 am

Looks like we’re going to see if Texas has gotten it’s electrical power generation problems corrected.

Joe Bastardi says what Is coming could rival the last time and 89. I was living with n San Antonio in 89 when that sub zero spat came in. Funny thing is I don’t remember any power problems back then.

AGW is Not Science
Reply to  rah
December 13, 2022 11:46 am

Yeah funny, isn’t it?

The difference being the proliferation of worse-than-useless wind and solar, aka “The Domino That Nearly Brought Down the Whole Texas Grid.”

December 13, 2022 8:08 am

So does global cooling induce hotter temperatures?

Hmm. We needed an expensive report using data from 27 countries to tell us heat exhaustion is a thing?

December 13, 2022 8:10 am

l can see why the climate movement are now trying to edge their bets.
The current state of the jet stream across the NH is set up for climate cooling as the smooth zonal flow across the NH appears to be breaking down. This breakdown of the zonal jet allows a increase in air mass movement in and out of the Arctic circle, while also causing more static weather patterning across the NH. lts this breakdown of the smooth zonal jet across the eastern half of the N Pacific is what is helping to set up cold weather patterning over N America.

Now as long as this set up is confined to a winter or two then its not a issue and it remains just weather. But should it start extending into the other seasons over a number of years. Then it will be setting us up for climate cooling.

Last edited 1 month ago by taxed
December 13, 2022 8:21 am

How many were caused by opening their utility bills? and sticker shock at the car dealership? and being cancelled by SF bay area censors?

Steve Case
December 13, 2022 8:32 am

December 13, 2022 8:33 am

Global cooling causes teeth chatter – we don’t want that.

Reply to  antigtiff
December 13, 2022 8:38 am

Dentists do and they have lobbyists also.

Hoyt Clagwell
December 13, 2022 8:34 am

It seems to me that an increase in greenhouse gases should cause a smaller temperature range with less extremes due to the fact that the places on Earth with the most GHGs are humid places with warm nights near the equator while the most extreme temperature swings happen where there is the least amount of GHGs in the atmosphere such as deserts. Is that not correct? Am I oversimplifying it?

Steve Case
Reply to  Hoyt Clagwell
December 13, 2022 12:01 pm

Exactly what the IPCC tells us:

IPCC AR4 Chapter 10 Page 750 

     Almost everywhere, daily minimum temperatures are projected to
     increase faster than daily maximum temperatures, leading to a
     decrease in diurnal temperature range

December 13, 2022 8:39 am

Yet another “Publish or be damned” paper. Many authors listed just to get a paper to put on their CV.

Ireneusz Palmowski
December 13, 2022 8:48 am

A major snowstorm is developing in the Midwest with winds of up to 60 km/h in gusts.
comment image

December 13, 2022 8:51 am

Years ago a cold spell in Brazil that ruined a coffee crop was blamed on global warming, The explanation was that all the warm air rising in north pulled cold southern air into Brazil.

December 13, 2022 8:55 am

Climate cooling… warming… change. Undeniable, unfalsifiable.

In past, present, and progressive times, cargo cults would perform human rites for social, redistributive, clinical, political, and fair weather causes.

Tom Halla
December 13, 2022 8:57 am

CO2 causes all bad weather?

Tom Abbott
Reply to  Tom Halla
December 14, 2022 3:56 am

That’s what the alarmists say. And they claim it’s going to get worse.

Of course, they have no evidence to prove any of that. But that doesn’t stop them from making the claims.

December 13, 2022 9:01 am
December 13, 2022 9:27 am

Well, “duh.”

Joao Martins
December 13, 2022 10:00 am

” Global Warming Induced Colder Winters Could Cause More Heart Attacks ”
Not news. Everyone knows that everything is caused by Global Worming TM.
Real news would be something NOT CAUSED by Global Worming TM.

Gary Pearse
December 13, 2022 10:10 am

“For every 1,000 heart-related deaths, there were an additional 2.2 deaths on days with extreme heat. There were also 9.1 additional deaths on days with extreme cold, the findings showed.”

‘the findings showed’ to a linear thinking climateer idiot! Severe winter weather causes much increased response times, increased demand for health services due to accidents, flu season …

Yep, even I can Google the reason and put this study in the garbage.

December 13, 2022 10:22 am

Are they trying to make us believe that by the very fact that we provide heat globally and uniformly in an environment (AGW hypothesis), we can cool some of its own areas?
Didn’t know that by turning on the oven in the kitchen I could cool the living room : will try next summer.

December 13, 2022 10:42 am

Climate alarmists are more likely to cause health issues, including those idiotic eco loons that glue themselves to roads blocking ambulances on emergency calls

December 13, 2022 12:10 pm

0.22% more deaths when too hot, 0.91% more deaths when too cold. There’s no way leftist eco nuts could push this as evidence for more CO2 villification, right?

Leftist nut: Hold my beer.

Chris Hanley
December 13, 2022 12:43 pm

A glance at the list of authors confirms Richard Lindzen’s observation that before the global warming (aka climate change) craze atmospheric physics meteorology and related fields were relatively thinly practiced specializations whereas now there is a surfeit of mediocre practitioners.

Last edited 1 month ago by Chris Hanley
December 13, 2022 12:49 pm

Eric, thanks for this timely warning. It was terribly cold when I went for a walk last night ~ 45F. I’ll have to consult with my doctor about this.

December 13, 2022 1:23 pm

They are sure going to see an increase in unexpected heart failure. There is currently a pandemic of “unknown cause of death” sweeping the western world. It may be kinda handy if they can link that to the “climate crisis” too.

Rich Davis
December 13, 2022 2:05 pm

Seriously 45 authors?

The inverse relationship between paper quality and author count is demonstrated once again!

Tom Abbott
December 13, 2022 5:58 pm

From the article: “Climate change produces both hotter summers and colder winters”

No, [Human-caused] climate change does not produce hotter summers and colder winters. There is no evidence for this. This is an unsubstantiated assertion. This is not science.

Reply to  Tom Abbott
December 13, 2022 8:26 pm

Yeah, where was that theory published again?

Steve Lohr
December 13, 2022 6:43 pm

I would expect that shoveling snow, chopping wood, and pushing stuck cars leads to cold weather heart attacks. Just an alternative thought game.

Tom Johnson
December 13, 2022 7:45 pm

It seems to me that due to Global Warming, there wouldn’t be any “extreme cold days.” All of them would have been in the past.

December 13, 2022 8:59 pm

Now the settled climate consensus appears to be that global warming causes all the bad weather, hot or cold.”

One suspects that the source citation for this is from a guardian article or a BBC show or similar fake news source.

Ulric Lyons
December 14, 2022 12:06 pm

“Climate change produces both hotter summers and colder winters”

With no reference for that, I reckon someone at the journal made sure it was in there.

Meanwhile a UK study estimates 56-141 times as many cold related deaths than heat related deaths:

December 14, 2022 4:23 pm

They’re looking for a scapegoat to blame for all the people who Died Suddenly. We know why, and it’s not because of climate change.

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