On Friday, the South Coast Air Quality Management District issued a smoke advisory for the fourth consecutive day, largely due to the elevated levels of unhealthy pollution billowing from the Eaton Fire in Altadena.

As thousands of acres burn across Southern California, wildfire smoke is causing poor air quality in the region and beyond.

Here's advice from SCAQMD: Avoid using indoor or outdoor wood-burning appliances, including fireplaces. Avoid vigorous physical activity. Keep windows and doors closed. Avoid using a swamp cooler or other fan that brings in outside air.

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.

Dhaka has ranked second on the list of cities with the worst air quality with an AQI score of 243 at 8:58am on Saturday. The air was classified as "very unhealthy", according to the AQI index on Saturday.

A series of huge, devastating fires ravaging Los Angeles County are blanketing virtually the entire region in toxic smoke. Interactive maps show that the particulate matter from the fires has rendered the air “unhealthy” in a wide area stretching from Pasadena to Downtown Los Angeles,

With fires still raging around Los Angeles and high winds expected to last through Friday, it's not clear when air quality in the region will improve, local experts said Thursday. The time it will take for smoke from wildfires burning around Los Angeles to dissipate is a moving target.

Millions woke up to hazy skies and poor air quality Wednesday morning as crews continued to fight the Palisades Fire in western Los Angeles, the Eaton Fire near Altadena and the Hurst/Sylmar Fire near Santa Clarita.