You should turn off fans when it's too hot – but how hot is too hot?

In extreme heat, fans might actually make you feel hotter rather than cooler, especially if you're older or in high humidity. The optimal temperature to switch off fans varies, but generally, it's wise to turn them down when the air feels too stifling. This isn't just about comfort; it's crucial for health, particularly for vulnerable populations like the elderly or those with preexisting conditions. Understanding these nuances can help you stay safer during heatwaves.