<story><title>Canada weather: Dozens dead as heatwave shatters records</title><url>https://www.bbc.com/news/world-us-canada-57654133</url></story><parent_chain><item><author>gruez</author><text>The effectiveness of this technique depends on the humidity being low. If you tried this when it&amp;#x27;s 80+% humidity it probably wouldn&amp;#x27;t do much.</text></item><item><author>hetspookjee</author><text>One thing I&amp;#x27;ve noticed when coping with severe heat, and often get laughed at, is to wear a wet t-shirt. It&amp;#x27;s incredible how instantaneous the relief is. I just take an ordinary cotton shirt, fold it neatly into a small packet and run it under the tap. Press it a few times so the water runs through the folded package and then unfold. Don&amp;#x27;t wring it as it will stretch the cloth beyond repair, and put it on. Initially it will feel weird and uncomfortable, but once it&amp;#x27;s on I feel my head getting more relaxed by the instant. You can even take a comfortable jog outside in 35C in the blasting sun for up to 10 minutes. The shirt will be near dry by than and it will get uncomfortable very quickly, but think of the possibilities! On extreme days I just wetten the shirt for 4-5 times a day and put a fan on me. No sweat when facing &amp;gt;35 degrees inside.&lt;p&gt;I tried it with pants as well but if you do so, don&amp;#x27;t wetten it  above the pockets as the multi-layer will make it damp without much of the adiabatic cooling perks.</text></item></parent_chain><comment><author>Cthulhu_</author><text>Or when it&amp;#x27;s over 52 degrees outside, when &amp;quot;wet bulb&amp;quot; temperature (= a thermometer in a wet cloth) goes over 35, which is what they&amp;#x27;ve been having in Pakistan. At that temperature, the evaporative cooling effect of water (like sweat) is no longer enough to manage temperature, and even fully healthy and hydrated people can die from heat exposure.&lt;p&gt;I mean I watched people in Canada in the news this morning and thought, why are they still outside in the sun even?</text></comment>
<story><title>Canada weather: Dozens dead as heatwave shatters records</title><url>https://www.bbc.com/news/world-us-canada-57654133</url></story><parent_chain><item><author>gruez</author><text>The effectiveness of this technique depends on the humidity being low. If you tried this when it&amp;#x27;s 80+% humidity it probably wouldn&amp;#x27;t do much.</text></item><item><author>hetspookjee</author><text>One thing I&amp;#x27;ve noticed when coping with severe heat, and often get laughed at, is to wear a wet t-shirt. It&amp;#x27;s incredible how instantaneous the relief is. I just take an ordinary cotton shirt, fold it neatly into a small packet and run it under the tap. Press it a few times so the water runs through the folded package and then unfold. Don&amp;#x27;t wring it as it will stretch the cloth beyond repair, and put it on. Initially it will feel weird and uncomfortable, but once it&amp;#x27;s on I feel my head getting more relaxed by the instant. You can even take a comfortable jog outside in 35C in the blasting sun for up to 10 minutes. The shirt will be near dry by than and it will get uncomfortable very quickly, but think of the possibilities! On extreme days I just wetten the shirt for 4-5 times a day and put a fan on me. No sweat when facing &amp;gt;35 degrees inside.&lt;p&gt;I tried it with pants as well but if you do so, don&amp;#x27;t wetten it  above the pockets as the multi-layer will make it damp without much of the adiabatic cooling perks.</text></item></parent_chain><comment><author>nszceta</author><text>No it does not. You wet your shirt with unheated tap water, wring it out, and wear it. Repeat as necessary every 15 minutes to 1 hour in extreme heat, no matter how humid it is.&lt;p&gt;In high humidity by wearing a shirt doused in tap water you cool down by heating up your t-shirt. This method does not work if water comes out of your tap already hot. This only happens rarely. In dry environments evaporative cooling helps but it is not necessary to be effective.&lt;p&gt;I recommend using shirts made of elastic breathable material such as under armor shirts for comfort. Cotton tends to stick  to your skin extra and feel really nasty.</text></comment>