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India heatwave temperatures pass 50 Celsius

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211–220 of 269 posts

Re: India heatwave temperatures pass 50 Celsius

#211
post #19

These temperatures in high humidity can be deadly even to healthy and fit humans as our bodies are left without a way to cool down. Currently, they have humidity around 10-20% so it affects the most vulnerable, but global warming may lead to making parts of the world literally deadly to every human being... https://en.wikipedia.org/wiki/Wet-bulb_temperature The wet-bulb temperature (WBT) is the temperature read by a…

How long can we stay in a sauna before it is deadly?

Re: India heatwave temperatures pass 50 Celsius

#212

Earlier quoted context omitted.

> fatal even to fit and healthy people, unclothed in the shade next to a fan; This is scary, what's a good way to survive for someone that doesn't have access to a bunker or AC? Immersing oneself in water in a bathtub?

The water is only cooler because it's evaporating, meaning the wet-bulb temperature also describes the water's own limit. 35°C is slightly cooler than body temperature, so it would work just a little bit as a heatsink, but another degree or two and even that becomes ineffective.

The phase change of water from liquid to gas is an endothermic reaction. In an emergency, if you had water and a fan, you could continually soak yourself and then accelerate water evaporation using the fan. This would keep you significantly cooler than the water temperature itself.

Re: India heatwave temperatures pass 50 Celsius

#213
post #73

Earlier quoted context omitted.

Been telling people for a while, if we think the amount of refugees from our wars is bad, just wait till you see the number arriving due to the fuel we burn. Though given our reaction to the current wave of refugees, we will blame the refugees for their own predicament and probably George Soros, as is tradition, long before we accept any blame ourselves.

Or we will simply not accept the refugees. As you said at current numbers it’s been really bad. At much higher numbers it will simply be a better and more popular option to close the border.

To riff on a common quote: if a million refugees want to get into your country and you don’t admit them, the refugees have a problem. If a billion refugees want in, you have a problem.

Nothing “simply” about it.

Re: India heatwave temperatures pass 50 Celsius

#214
post #146
post #19

These temperatures in high humidity can be deadly even to healthy and fit humans as our bodies are left without a way to cool down. Currently, they have humidity around 10-20% so it affects the most vulnerable, but global warming may lead to making parts of the world literally deadly to every human being... https://en.wikipedia.org/wiki/Wet-bulb_temperature The wet-bulb temperature (WBT) is the temperature read by a…

How are https://en.wikipedia.org/wiki/Wet-bulb_temperature and https://en.wikipedia.org/wiki/Heat_index related?

They're two attempts to measure the same thing, but with different results. Heat index is measured assuming a human walking at 3mph in the shade and attempts to show how hot the air feels when you take into account the humidity (and associated lack of cooling from perspiration).

Wet-bulb is the measurement of the lowest possible temperature a human body can achieve under current ambient temperatures and humidity (taking into account current wind speed). Basically the air temperature minus the ability to cool yourself by sweating given the current wind speed.

They're both designed to show how hot the air feels to your body rather than just air temperature, just with different calculations and assumptions.

Re: India heatwave temperatures pass 50 Celsius

#215
post #19

These temperatures in high humidity can be deadly even to healthy and fit humans as our bodies are left without a way to cool down. Currently, they have humidity around 10-20% so it affects the most vulnerable, but global warming may lead to making parts of the world literally deadly to every human being... https://en.wikipedia.org/wiki/Wet-bulb_temperature The wet-bulb temperature (WBT) is the temperature read by a…

here in my part of canada temperatures are regularly deadly, ie below 0°C. its a legitimate problem for homeless and otherwise vulnerable people.

while some parts of the world warm to become uninhabitable, others will warm to the opposite.

Re: India heatwave temperatures pass 50 Celsius

#216
post #205

I think humidity is a big problem in a lot of places in India with high temperature. In my village in easter UP in India, summer was intolerable because of high humidity and shortage of electricity. (We used to have 8hours electricity per day, but sometimes outages would happen and would go unrepaired for week to month). It was impossible to do anything but take a hand fan and use it to cool yourself. A lot of the ti…

Now days, you can get 24x7 electricity in tier 1, 2 & 3 cities. I am not sure about villages. Our country is almost power surplus nation now.

That’s hard to believe, there are still power cuts (even if for 1-2 hours max) in summers.

Re: India heatwave temperatures pass 50 Celsius

#217
post #205

I think humidity is a big problem in a lot of places in India with high temperature. In my village in easter UP in India, summer was intolerable because of high humidity and shortage of electricity. (We used to have 8hours electricity per day, but sometimes outages would happen and would go unrepaired for week to month). It was impossible to do anything but take a hand fan and use it to cool yourself. A lot of the ti…

Now days, you can get 24x7 electricity in tier 1, 2 & 3 cities. I am not sure about villages. Our country is almost power surplus nation now.

Get 24/7 electricity from what source? The state run power producers don’t provide this in many tier 2 cities (pick some names and check). I strongly doubt if all tier 1 cities (except probably Mumbai) get power 24/7 either.

Power is cut during summers, during rains, and at other times very regularly. There are plenty of reasons and excuses for that to be happening.

Re: India heatwave temperatures pass 50 Celsius

#218

A slightly redacted version of my earlier post. Dear HN crowd, it might not feel like it but we are quite influential. We are rich and therefore have a non-negligible command over economy. Silicon Valley is cool and people look up to us (do they? I don't really know, but wasn't Steve Jobs a national hero?) and may follow our example. Please, take the lead. Here are a few things an hornorable member of the HN communit…

Wow, the bubbles some of you people live in. What a joke!

Re: India heatwave temperatures pass 50 Celsius

#219
post #211
post #19

These temperatures in high humidity can be deadly even to healthy and fit humans as our bodies are left without a way to cool down. Currently, they have humidity around 10-20% so it affects the most vulnerable, but global warming may lead to making parts of the world literally deadly to every human being... https://en.wikipedia.org/wiki/Wet-bulb_temperature The wet-bulb temperature (WBT) is the temperature read by a…

How long can we stay in a sauna before it is deadly?

Most saunas have relatively low levels of humidity, between 20% and 30%. It's hard to keep high humidity levels when temperature rises. Other than that, it's generally suggested to not exceed 20 minutes in a sauna. Steam rooms on the other hand have higher humidity levels but lower temperature and it's not allowed to stay more than 15 minutes inside.

From personal experience I've never used a sauna for more than 10 minutes and I always carry a bottle of water with me inside.

Re: India heatwave temperatures pass 50 Celsius

#220
post #130

Earlier quoted context omitted.

> fatal even to fit and healthy people, unclothed in the shade next to a fan; This is scary, what's a good way to survive for someone that doesn't have access to a bunker or AC? Immersing oneself in water in a bathtub?

A tub will work, sure, as long as it's pulled from a large body of water that hasn't warmed up with the air. Hopping in the local lake is an obvious choice. But in a detached demographic sense: effectively everyone lives in a city in the modern world, and while their housing might not be air conditioned most of the major buildings are. In an emergency like this everyone would just crowd into office buildings and shop…

> effectively everyone lives in a city in the modern world, and while their housing might not be air conditioned most of the major buildings are. In an emergency like this everyone would just crowd into office buildings and shopping malls.

Heat waves spur increases in violent crime, limited in some degree by the fact that people stay in their own homes in really hot (but not uninhabitably so) heat waves.

Heat waves that go further to where the only survivable solution is pulling people out of their homes into large communal shelters (whether they otherwise serve as offices or shopping malls or whatever) is...going to be very ugly.

And that's even before considering whether the facilities or supporting infrastructure (plumbing, electrical systems, etc.) are adequate to support these places being used as shelters. Almost certainly they won't be until it's happened and failed a few times, and even after that the places that most need it will be the least able to finance the necessary upgrades.

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