A PSI score of over 100 indicates unhealthy air conditions. Check the predicted PSI in your area. Be careful if the PSI is greater than 100. Be careful also if there are high-risk weather conditions, such as a hot, sunny day, and you begin to develop symptoms like chest tightness, burning eyes or a cough. Stay indoors as much as you can during the day.
Many pollutants have lower levels indoors than outdoors.
If you must go outside, limit outside activity to the early morning hours or wait until after sunset. Don't exert yourself. The faster you breathe, the more pollution you take into your lungs. These steps will generally prevent symptoms in healthy adults and children. However, if you live or work close to a known pollution source, or if you have a chronic heart or lung problem, talk with your doctor about other ways to deal with air pollution.