this post was submitted on 03 Aug 2026
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[–] VeryInterestingTable@jlai.lu 10 points 1 day ago

Coolest summer for the rest of our lives. Enjoy it.

[–] Seimhe@lemmy.world 16 points 1 day ago (2 children)

It doesn’t seem like outdoor work has been stopped, but just outdoor leisure pursuits and sporting events.

[–] WhatAmLemmy@lemmy.world 12 points 1 day ago

The capitalism must continue until the planet collapses

[–] atro_city@fedia.io 8 points 1 day ago

Workers are disposable to the rest of the country. Nothing new.

[–] atro_city@fedia.io 5 points 1 day ago

I wonder what the government will do... expand public transport? Plant more trees and make cities greener? Transition more quickly to green tech?

Probably not, eh? Just business as usual, I bet.

[–] givesomefucks@lemmy.world 7 points 1 day ago (3 children)

I saw the other day that traditional grass isn't much better than pavement at cooling down urban areas.

Compare to native plants it also makes flooding and poor water retention bigger problems as well.

We need less "parks" and more just oasis of untouched nature. A random city block where no people go into and nature is allowed to do what it wants would drastically lower surrounding temperature.

[–] CapuccinoCoretto@lemmy.world 4 points 1 day ago

50% of every significant habitat should be untouched by humans. Our parks, farms, industry and communities must all be contained in the other 50%, as a rough guideline.

[–] eleitl@lemmy.zip 2 points 1 day ago

I have a grass roof -- with trees on it, and it absolutely cools, especially when misted with water.

[–] bloogoose@lemmy.zip -1 points 1 day ago (1 children)

Humans need to go. Got it.

[–] givesomefucks@lemmy.world 5 points 1 day ago

I don't know a single human that requires a closely mown lawn of 100% grass to survive...

But even just mowing at 4ish inches, spreading clover, and not spraying for "weeds" turns your lawn into a habitat for the vital species every human does require....

Like, just that's enough to make a huge difference. If you're in an urban area and can let even a small shared border with a neighbor grow up naturally... Now you're really cooking

Seriously though, if the sun can't hit the dirt, it makes a huge fucking difference. Even if it hits plants a few inches above the dirt.

Closely mown grass doesn't get the job done at blocking the sun, and shallow roots means flooding. The two combined compound each other.

[–] DarrinBrunner@lemmy.world -1 points 1 day ago

42.5 °Celsius = 108.5 °Fahrenheit

Happens a lot of places.

[–] sudo@lemmy.today -3 points 1 day ago (3 children)

Somebody should tell them using fans in 40+ is cooking them, not cooling them.

[–] Gerudo@lemmy.zip 9 points 1 day ago

It is effective because there is sweat involved.

[–] zikzak025@lemmy.world 11 points 1 day ago

Maybe word it carefully though, I don't think we need to contribute more to South Korea's fear of fan death.

[–] givesomefucks@lemmy.world 2 points 1 day ago (1 children)

It 100% helps...

The body radiates heat, through metabolic process.

If the air is 40C (105 degrees freedom) then the human body will cause the air around it to get even hotter. Which then causes the body to get hotter.

It's a feedback loop, and literally the reason it's dangerous

A fan blows that air away, replacing it with new hot air, but still breaking the feedback loop.

The body will keep increasing in temperature, but it will happen slower than without a fan.

And that's not even getting into how a fan would increase the efficiency of sweating.

You have no idea what you're talking about and this is a serious thing that people all.obwr the world die from constantly. Their lives matter more than you feeling smart. So when you don't know about important shit, ask questions.

Like:

I don't think fans would help, does anyone know?

That way you're not spreading dangerous misinformation like what you just did.

[–] sudo@lemmy.today 4 points 1 day ago (2 children)

Interesting that you're confidently suggesting you know better than the published guidelines of the World Health Organization.

Use electric fans only when temperatures are below 40˚C / 104˚F. In temperatures above 40˚C / 104˚F, fans will heat the body.

[–] givesomefucks@lemmy.world 1 points 1 day ago

Interesting

Just imagine how much more interesting it would be if you asked questions instead of not understanding things and hoping people answered questions you hadn't thought to ask...

As I said, sweat has a lot to do with it, and as I didn't think to imply because I I estimate people chronically: Humidity is just as important if not more so

To test these recommendations in high-risk groups, Jay and colleagues recruited people over age 65, some of whom had heart conditions. As people age they perspire less, so they get less cooling from evaporating sweat. And cardiac problems such as heart attacks are one of the biggest dangers 
of overheating.

The researchers tested 58 people inside special climate-controlled chambers that created two different climates: a humid one resembling places like Mumbai, India, at 38°C and 60% humidity, and a desertlike setting at 45°C and 15% humidity.

When exposed to the moist heat for 
3 hours, even older people with coronary artery disease showed a 31% reduction in cardiac stress—based on heart rate and blood pressure—while sitting in front of a fan, compared with a separate test with no fan. When the participants were spritzed with water while in front of a fan they fared even better, with a 55% lower stress level. People without heart disease got even more benefit in all scenarios.

“Under the hot humid heat conditions, we show definitely that fans are protective at a temperature above the threshold used by CDC,” Jay says. That, he says, is because by circulating the air, the fans enabled more moisture on the skin to evaporate than if air close to the body remained stagnant.

By contrast, results in dry conditions starkly illustrated the dangers of misusing fans. The scientists stopped the experiments after testing just 14 people because their cardiac stress went through the roof as the fan blew hot air on them. Nearly half the participants couldn’t stay in the test room for 3 hours. The reason for that dramatic response: The air was so dry that any sweat quickly evaporated, resulting in little additional cooling as the fan bathed participants in extremely hot air, Jay says.

https://www.science.org/content/article/when-is-it-too-hot-use-fan

Anything else you say I'm sure will be similarly wrong, I'll just never see it to explain how you're wrong

[–] warm@kbin.earth 1 points 1 day ago

So we can use hand fans, got it.