How is humidity related to how we can stand high temperatures?

Question

I know that if there are for instance 40deg Celsius but the humidity is not so high you don't feel as hot as if there were 30 deg but the humidity was high. Is this true? Can we withstand more extreme temperatures if the humidity is low? If so, why?

Answer 1

All humans sweat to keep their bodies cool, right? Basically, what happens is, our sweat is evaporated from our skin from the heat, and absorbed into the air. As the sweat evaporates, it takes some heat energy from us, therefore cooling us off by taking away some heat energy. This is how sweat works!

The air's ability to absorb water (or 'sweat' in this case) depends on how much water vapor is already in the air. The air can only hold so much water vapor. The amount of water vapor the air is currently holding is called the humidity. If there is a high humidity, that means there is a lot of water vapor in the air. If there's a low humidity, it means that there isn't a lot of water vapor in the air.

So, let's connect sweating with humidity! If the humidity is high, that means there is a lot of water vapor already in the air (sorry for being repetititve), which means that the rate at which your sweat is evaporated off your skin is very, very slow. Remember, it's not the sweat itself that cools you down, but the act of the sweat evaporating from you skin. When there's a high humidity, the sweat just stays on your skin and soaks up in your clothes, causing lots of discomfort. When there's a low humidity, that means that the air doesn't have that much water vapor in it, so the heat is able to evaporate the sweat off your skin efficiently!

Also, according to the Wikipedia article regarding humidity and its effects on the human body, it says that if the atmosphere is warmer than the skin during high humidity, blood brought to the surface of the skin cannot lose heat (blood being brought to the surface of the skin is also a cooling mechanism - makes sense, too, since your blood is circulating to all the parts of your body, making this cooling system efficient). With so much blood going to the surface of the skin in an effort to cool the body down, less is going to the muscles, internal organs, and the brain.

So yes, regarding your question, we can withstand more extreme temperatures if the humidity is low because we are able to cool off by sweating and releasing heat from the blood efficiently. If the humidity is high, then we can't cool off as effectively, and we're likely to injure ourselves (heat stroke, dehydration, etc.) in some way.

Hope this helps! The links below are my sources.

Answer 2

i like crystallised products offered in wellness nutrition shops, and the slices offered via highway distributors in Thailand. those we get interior the united kingdom are tricky, chewy and extremely bitter usually. no longer great in any respect.