08-28-2022, 11:40 PM
I checked the old posts, and I had a better chart for heat indexes relating heat and humidity to danger. Here we go again:
![[Image: heat-index-chart-relative-humidity.png]](https://www.iweathernet.com/wxnetcms/wp-content/uploads/2015/07/heat-index-chart-relative-humidity.png)
I prefer this one for showing the effects of high temperatures and low relative humidity.
130F (roughly 55F) is a heat index, of extreme danger, and with 100% humidity it is possible at 90F. With as little as 14% relative humidity such is possible at 126 F. So you can't say "It's the humidity and not the heat". It's both. One must take shelter from this sort of heat. A hint: many heating decices warn people to not heat water above 120F due to the risk of thermal injury.
Between 105F and 129F is "very hot". This is itself dangerous. 104F with 35% relative humidity will put you at the lower borderline. So will 14% with 108F... and 86F with 100% humidity, which one would find within the hottest parts of the western Pacific Ocean. Swimming in water that warm will not cool you. I experienced this a few times last week with temperatures just under 90F but high humidity (this is southern Michigan)
. After rains abated one late afternoon I was able to believe that because the sky was overcast conditions might be humiud but not hot. It was both. I lasted about 15 minutes mowing the lawn and had to quit.
When not exerting myself -- and sleep is clearly non-exertion -- I awoke with leg cramps several times in the last two weeks. Ouch!
90F to 104F is simply "hot".
"Very warm" is possibly too much for your dog even if you can acclimatize yourself to it.
I prefer this one for showing the effects of high temperatures and low relative humidity.
130F (roughly 55F) is a heat index, of extreme danger, and with 100% humidity it is possible at 90F. With as little as 14% relative humidity such is possible at 126 F. So you can't say "It's the humidity and not the heat". It's both. One must take shelter from this sort of heat. A hint: many heating decices warn people to not heat water above 120F due to the risk of thermal injury.
Between 105F and 129F is "very hot". This is itself dangerous. 104F with 35% relative humidity will put you at the lower borderline. So will 14% with 108F... and 86F with 100% humidity, which one would find within the hottest parts of the western Pacific Ocean. Swimming in water that warm will not cool you. I experienced this a few times last week with temperatures just under 90F but high humidity (this is southern Michigan)
. After rains abated one late afternoon I was able to believe that because the sky was overcast conditions might be humiud but not hot. It was both. I lasted about 15 minutes mowing the lawn and had to quit.
When not exerting myself -- and sleep is clearly non-exertion -- I awoke with leg cramps several times in the last two weeks. Ouch!
90F to 104F is simply "hot".
"Very warm" is possibly too much for your dog even if you can acclimatize yourself to it.
The ideal subject of totalitarian rule is not the convinced Nazi or the dedicated Communist but instead the people for whom the distinction between fact and fiction, true and false, no longer exists -- Hannah Arendt.