> <i>CDC recommends not using a fan at temperatures above 32.2°C</i><p>I don't know quite how to put this, but are they <i>idiots</i>? I don't quite mean that, but at the very least there's <i>something</i> weird going on. I double down on this as they double down on their recommendation at the end of the article.<p>Go to places like India, and see how people use fans, in the humid places like Kolkata and the dry places like Hyderabad. Fans <i>obviously</i> provide <i>great</i> relief at far higher temperatures than their 90°F. The very idea of suggesting not to use fans from such a low temperature is, to me who grew up in Melbourne, Australia and now lives in Hyderabad: ludicrous.<p>Even when they talk about "people who are less able to cope with heat", it sounds like they may be giving advice very harmful to normal people, for the <i>possible but highly contested</i> safety of a few.<p>——<p>When talking about ineffectiveness of fans in high temperature low humidity (which is Hyderabad summer to a tee—it barely gets <i>below</i> CDC's 90°F, and is very dry), the details mentioned make me sceptical of the entire approach of the studies. I know each time I've come to India, it's taken me well over a week to adjust to the temperature. (I still sweat more than most Indians do, but not as much as a day or two after I come.) And hydration is a rather important factor too, likely not accounted for adequately. We're talking definite heat stress circumstances, you can't expect to get accurate results from an unacclimated body.<p>Yes, I am a layman casting doubt on the work of experts without investigating carefully. I imagine they've been at least somewhat careful about these things, none of these people will be idiots. It's probably not all as bad as the vibes I'm getting. Do treat my scepticism with scepticism of your own.