YT DESC: Air quality in the San Francisco Bay Area in the United States reached ‘unhealthy’ levels on Wednesday, Sept. 20, officials warned, after smoke from multiple wildfires from Northern California and Oregon drifted into the region.

The Bay Area Air Quality Management District said that the air quality is ‘unhealthy for sensitive groups’ and ‘unhealthy’ overall and that the smoke now contains a fine particulate matter known by the particles’ size as PM2.5, which can have a major impact on people’s health.

The origin of the smoke stems from the Pearch Fire, Blue Creek and Marlow fires, Bluff 1 and Mosquito fires, and Smith River Complex fire in California and the Anvil Fire in Oregon, Duc Nguyen, the district’s principal air quality meteorologist, said.

The brunt of the impact on the Bay Area currently is south of the Golden Gate Bridge, Nguyen said.

(Report from Reuters; Production: Nathan Frandino)

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