Already known for having some of the worst air quality in the U.S., people in Southern California are now also at risk of inhaling smoke.

Smoke from the raging Southern California wildfires is filling city skylines, causing officials to warn residents of poor air quality.

Millions of Los Angeles County residents are facing extremely hazardous air quality as wildfires continue to burn. The air quality index in Los Angeles on Wednesday was 178, which is considered to be "unhealthy" for any individual who is active outdoors.