The air in São Paulo today feels like it’s been sitting still for a while, kind of heavy and a bit stale, with a faint smoky edge that catches in your throat if you take a deep breath. It’s not the worst we’ve seen, but it’s definitely not the crisp, open-air feeling you’d hope for on a nice afternoon. You might notice your eyes feeling a little dry or a tickle in your chest if you’re out and about.

If you’re planning to exercise outdoors, I’d suggest taking it easy today or maybe skipping the jog altogether, because that thick air can make your lungs work harder than they should. It’s fine for a quick walk to the corner store, but I wouldn’t linger in the park or open all the windows wide to air out the house, that haze outside will just drift right in. For most of us, it’s more of a nuisance than a danger, but it’s worth being mindful.

Kids, older folks, and anyone with a sensitive chest or a heart condition should be especially careful today, as the air can stir up trouble for them more quickly than for the rest of us. If you or someone in your family falls into that group, it’s a good day to keep indoor activities going and maybe run a fan or an air purifier if you have one. I’d avoid long stretches outside, especially near busy roads where the exhaust adds to the stuffiness.

Here’s the thing: this is one of those days where a little common sense goes a long way. Keep your windows closed, stay hydrated, and if you need to go out, a simple mask can help filter out that heavy feeling. By tomorrow, the breeze might shift and clear things up, but for now, take it slow and give yourself a break, your body will thank you.