For weeks, smoke has blanketed the west coast. The Bay Area has seen a vast improvement in the past few days, but terrible air lingers in Portland and Seattle. Millions of people have been furiously checking the air quality ratings in their neighborhood regularly. On the worst days, in some places the Air Quality Index (AQI) measured 600. Readings over 150 trigger emergency health warnings if a person is exposed for 24 hours. For many, the only way to confront the smoke- and ash-filled days was with the help of AQI apps.
Click here for original story, Extreme wildfires turn smoke apps into the new weather apps
Source: Phys.org