Today the air in São Paulo feels a bit heavy and stuffy, like the city is holding its breath. You might notice a slight haze in the distance, and breathing can feel a little harder than usual, especially if you step outside for a while. It is not the kind of day where the air feels clean and fresh, so you will want to take it a bit easier.
If you were planning a long run or a bike ride outdoors, it might be smarter to shift that to tomorrow or find a spot indoors instead. Opening the windows wide to air out the house is not a great idea right now, since the air outside is not doing us any favors. A short walk to the corner shop is fine, but I would not linger outside longer than you need to.
For anyone with breathing troubles, a heart condition, or for little ones and older folks, this is a day to take it slower and stay inside as much as possible. Even if you feel healthy, you might notice your chest feeling a little tight if you overdo it, so listen to your body. The air is just not cooperating today.
The good news is this kind of heaviness usually passes, and tomorrow might feel completely different. For now, keep the windows shut, take it easy, and give yourself permission to rest indoors. You will be fine as long as you do not push yourself outside.