this post was submitted on 17 Jul 2023
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It’s a bit different depending on your health and all that. But 35 WBT is a definite point for everyone (since our bodies run at 36–37C). Kinda like the difference between “some will die” and “most will die”.
I mean to say that the wet bulb temperature at which most will die is ~31.5°C, the gaurdian report I linked is saying that the 35°C number comes from a 2010 study, whereas the findings of the 2022 study found the number to be much lower ~31.5°C.
It’s probably a measure for persistent temperature then. Like, if you lock someone in a room at that temperature (or if it wouldn’t cool down at night, for example), then that person would be dead no matter what after some amount of hours or days.
35 is more of a real-life guideline, since it does cool down at night and you don’t need to withstand this temperature persistently and indefinitely.
And for the last several years there have been lots of places that exceeded 31.5 WBT during the day. Hell, you can probably find several places with that WBT right now. But since people don’t drop dead immediately and need time to heat up, it’s still survivable.
Think about it in terms of a 2D graph. You need to know the duration in addition to temperature to gauge survivability. A million degrees is survivable for a femtosecond, 35 for an average earth day, and ~31 indefinitely.
If that was true, people would die in Russian sauna - 80-90° at 100% humidity with 10-20 minute sessions.
Well, people do die in saunas. More often than you might think. And those who can sit through 20 minutes are usually already accustomed to them, it’s not like people can sit for a long time the first time. Stick an unprepared elderly person there and it’s often not going to end well.
Also, right after intense sauna sessions (and in between as well) people dunk themselves into very cold plunge pools or snowdrifts to quickly cool off.
And you got the temperature/humidity ratios wrong. 100% humidity is used in a hammam, a Turkish-style steam room, and those are kept at around 45-55C. Russian saunas never exceed 90%, most are kept at around 70%.
Have you been to one and looked at the hydrometer? It’s really hard to raise the humidity above 70–80%, and the usual for most people 1-2 ladles per ~10 mins barely raises the humidity above 60%.
I read that as 1-2 ladies per ~10 min... talk about death by snu snu.
Yes, been to a lot of times.