Deadly wildfires raging Friday in Oregon, Washington and California made two major West Coast cities — Portland, Oregon, and Seattle —the places with the worst air quality in the world. Portland had an air quality index of over 200 on Friday — more than that of any other major city in the world, according to IQAir, a Swiss air quality technology company that operates a real-time air pollution monitoring platform. Seattle ranked second, with an AQI of around 190.

Source: Huffington Post September 11, 2020 19:07 UTC